Find the exact value of cos2theta if sin2theta=3/4 and theta is between 0 and 90 degree

2) Amanda invests $6,540 in a retirement account with a fixed annual interest rate of 5% compounded 6 times per year. What will the account balance be after 20 years? A) $16,031.88 B) $17,704.05 C) $15,329.01 D) $16,844.10

A rectangle has width w and its length is 3 units shorter than 5 times the width, or 5w - 3. Write a polynomial for the area of the rectangle.

Nine students take a test, none get the same score, and each score is a positive integer. If their mean score is 14, then what is the highest possible score on the test?

One week, Melissa walked to school and back every weekday. she walked from home to the library and back on Saturday, and from home to the mall and back on Sunday. Melissa had a goal of walking 15 miles in one week. Did he meet her goal? explain.

What is the slope of y=2/6x-9

What is the quotient and remainder for 52 : 8

Consider the equation and the following order pairs (-2, y) and (x, 2) y=-3-1

What Number is X in this equation? 6 : 2 (1 + 2) = X

A cylindrical tank holds 20,000 gallons of water, which can be drained from the bottom of the tank in 20 minutes.

The perimeter of a square is 4 times as great as the length of any of its sides. Determine whether the perimeter of the square is proportional to the side length. Explain your reasoning