a sphere has a great circle with a circumference of 20pi inches. what is the surface area of the sphere?

4x5-10-2 (1-2) + 5 what's the answer

Alexa is buying lace to sew around the edge of a round tablecloth. The radius of the tablecloth is 2 3/4 feet. If lace is sold by the yard, what's the smallest number of whole yards she can buy to have enough lace for the tablecloth?

Sam wrote the number 1-100 and placed them in a bag. If he selects a number without looking what is the probability that the number contains a 7 in it?

Kenneth drove 180.9 miles in 3 7/20 miles. What was his average speed?

The sum of two numbers is nine. If one number is subtracted from the other, the result is - 3. Find the numbers

There are 5,280 feet in one mile how many feet are in 143 miles?

At the city museum, child admission is $5.40 and adult admission is $8.70. On Friday, 170 tickets were sold for a total sales of $1224.90. How many adult tickets were sold that day?

Becky spent 2/3 of her piano practice time on her recital piece. If she spent 25 min. on other pieces how many hours did Becky spend practicing

8sin (0.3x - 3) + 74,

What is the slope and y-intercept of the linear equation y = 5x - 4? M = ? B = ?