What is the equivalent of 90° in radians?

Chris wants to reduce a triangular pattern with sides 16, 16 and 20 centimeters. If the longest side of the new pattern is to be 15 cm, how long should the other two sides be?

A twelve inch candle and an 18 inch candle are lit at 6pm. The 12-in. candle burns 0.5 inches every hour. The 18 inch candle burns two inches every hour. At what time will the two candles be the same height? Let h represent the number of hours.

Percent increase 18 to 45

Sam the Sham is an unfair shoe salesman. He has a pair of shoes that was priced at $60 last week. To entice customers, he wants to put a "25% off'' tag on the shoes but he still wants the customer to pay $60 for the shoes.

The value of x decreased by 80% is y and the value of x increased by 200% is z. What is the value of z-y?

What is the volume of a cylinder With base radius 4 and height 5

What expression is equivalent to (2x4 y) 3?

If two pounds will serve 5 people how many pounds will serve 13 people

What is the negative coterminal angle of 165 degrees?

What is the simplified form of this expression, written in scientific notation? (1.5*107) ⋅30,000⋅ (6.7*105)