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a rocket is launched from a tower. the height of the rocket, y in feet, is related to the time after launch, x in seconds, by the given equation. using this equation, find the time that the rocket will hit the ground, to the nearest 100th of second.equation: y=-16x^2+153x+98
General
4 months ago
Joy needs to mix a 20% acid solution with a 60% acid solution to create 100 millileters of a 28% solution. How many millileters of each solution must Joy use?
General
4 months ago
If 2a = 80 and b = c, what is the measure of bA.) 40B.) 50C.) 80D.) 100
General
4 months ago
What is the equation of the line that passes through the point of intersection of the lines y = 2x − 5 and y = −x + 1, and is also parallel to the line y equals start fraction one over two end fraction x plus four question mark?
General
4 months ago
A certain car depreciates such that its value at the end of each year is p % less than its value at the end of the previous year. If that car was worth a dollars on December 31, 2010 and was worth b dollars on December 31, 2011, what was the car worth on December 31, 2013 in terms of a and b ?
General
4 months ago
You’re assisting a craft vendor at a fair who sells 5 knit hats for $9.50 each. She then sells the sixth and seventh for $11.25 each, and the eighth and ninth for $8.75 each. At the end of the fair, she is charged 15% of her gross earnings for the booth space. How much money does she make after paying for the booth space?
General
4 months ago
Can somebody help me? Write the phrase as an expression. Then evaluate when x = 2 and y = 10. #1 Twelve more than the product of 5 and a number x. #2 15 decreased by the product of a number x and 4. #3 You eat 5 slices of bread. Your friend eats 2 slices fewer than you eat. Write an expression that describes the number of slices your friend eats. #4 Your uncle is 2 years older than 3 times your age. A. You are x years old. Write an expression that describes your uncle's age. B. You are 12 years old. How old is your uncle.
General
4 months ago
The below figure is a parallelogram. Find the values for each variable.
General
4 months ago
"How much do students pay, on average, for textbooks during the first semester in college? From a random sample of 400 students the mean cost was found to be $357.75 ,and the sample standard deviation was $37.89. Assuming that the population is normally distributed, find the margin of error of a 95% confidence interval for the population mean. Compute the confidence interval and describe in words what it means."
General
4 months ago
the total heigh of bill mary and rob is 180 cm bob is twice as tall as bill and mary is 28 cm taller than bill how tall is rob
General
4 months ago
A tourist in ireland wants to visit seven different cities. if the route is randomly selected, what is the probability that the tourist will visit the cities in alphabetical order? round your answer to five decimal places.
General
4 months ago
Hays builds model sailboats as a hobby. The dimensions of the sailboats are given. What is the height, x, of the smaller sailboat's sail? Enter your answer, as a decimal, in the box. x = in. Two sailboats with sails that are right triangles. The top angle on the sails are marked congruent to each other. The smaller sail has a height of x and a base of 7 inches. The larger sail has a height of 12 inches and a base of 8 inches.
General
4 months ago
Determine whether each pair of angles is a pair of vertical angles, a linear pair of angles, or neither. Select the correct answer for each lettered part.
General
4 months ago
a school district requires all graduating seniors to take a mathematics test. This year, the rest scores were approximately normally distributed for the 1208 graduating seniors. This mean score on the test was a 74 and the standard deviation was 11. what percent of the graduating seniors had a test above 85? Express your answers to the nearest percent.
General
4 months ago
Rose bought some spinach. She used 3/5 of the spinach on a pan of spinach pie for a party and 3/4 of the remaining spinach for a pan for her family. She used the rest of the spinach to make a salad. What fraction of the spinach did she use ti make the salad?b. If Rose used 3 pounds of spinach to make the pan of spinach pie for the party , how many pounds of spinach did Rose use to make salad?
General
4 months ago
Subtract 1.05 from a certain number. Multiply the difference by 0.8, add 2.84 to the product then divide the sum by 0.01 and get 700. What is the number?
General
4 months ago
a) Wilma used to make 10.50 per hour, but then she got an 8% raise. How much does Wilma make per hour now?1) $11.002) $11.143) $11.344) $11.54b) You went to the store and bought some DVDs. The cost of the DVDs was 45.80. The sales tax is 5%. How much is your total cost?1) $48.092) $48.193) $48.294) $48.39c) What is 2/3 of 30?1) 102) 153) 204) 25d) Arrange in order from least to greatest: 1/2, 3/4, 5/7, 13/141) 1/2 < 3/4 < 5/7 < 13/142) 1/2 < 5/7 < 3/4 < 13/143) 3/4 < 5/7 < 13/14 < 1/24) 13/14 < 1/2 < 3/4 < 5/7e) Which property is demonstrated by this equation? 3(1 + 2) = (1 + 2)31) Commutative property2) Associative property3) Distributive propertyf) Which property is demonstrated by this equation? 2 + 3 = 3 + 21) Commutative property2) Associative property3) Distributive propertyg) Which property is demonstrated by this equation? 3 • (1 • 2) = (3 • 1) • 21) Commutative property2) Associative property3) Distributive propertyplease answer fast
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4 months ago
A candidate to the presidency wants to know what percentage of the registered voters in the country would vote for him. So, he gives that task to one of his aides and tells him he has 3 days to come up with the results. Describe a method the aide should use to complete the task in time and which provides meaningful data. Use size of the sample, population of interest, and method of selection to complete your answer.
General
4 months ago
Can someone help me on both of the questions?!
General
4 months ago
Determine whether the given triangles are similar. Justify your answer. If they are similar write a similarity statement. How do you do this?
General
4 months ago
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