What is the formula for the area A of a circle in terms if the radius r?

I don't understand what the question is asking

Which fraction is equal to 4

What number to the power of - 2 gives you (4/25)

David wants to buy a game system and his favorite game. The game costs $25 and is 1/5 of the price of the game system. How much does the game system cost?

Which of the following rates is proportional to $2.50 for 5 cans? A. $2.00 for 3 cans B. $4.00 for 7 cans C. $4.50 for 9 cans D. $1.50 for 1 can

The time needed for a 15 miles long hike depends on the average speed of the hiker. Write the formula that describes this time as the function of the average speed. Answer: If the average speed is v, then the time t=

Haylee has $15.00 to spend at the store. She is going to buy chips at cost $3.25 each and one Cinnabon that cost $2.50 how can I write this into a equation that can be used to calculate the maximum number of bags of chips, v, haylee can buy

Can you name the trigonometric expression that is equivalent to the following expression 1/secant of x?

Noah has a $20 gift card for an online music store. All songs at the store have the same price. After Noah buys 3 songs the balance on the card is $16.25. What will be the ram aiming balance on the card after he buys 5 more songs?

If the mean of five values is 64, find the sum of the values.

Which expression is equivalent to the one shown below? 3 (4 g + 11)