How do i find the area of a semicircle

Eleanor deposit 20 percent of the money that she earns each week in a savings account. if elanor earn $85 each week, how much money will she deposit each week

The gasoline gauge on a van initially read one fourth14 full. when 1010 gallons were added to the tank, the gauge read two thirds23 full. how many more gallons are needed to fill the tank?

A single doe is rolled one time. Find the probability for rolling a number greater than 2 or less than 6?

8x-2y=-26; 2x+5y=-23

A worker can complete the assembly of 15 DVD players in 6 hours. At this rate, how many can the worker complete in a 40-hour work week?

Jerry measured and timed the descent of a diving bell spider in a large fish tank. The spider reached a position 412 412 inches below the surface of the water after descending at a constant rate for 112 112 seconds.

The expression 5/9 (f-32) gives the temperature in degrees celsius for a given temperature in degrees fahrenheit f. find the temperature in degrees celsius that is equivalent to 86 f

The formula for the surface area of a cube is S 5 6x2 where x is the length of one side. Find the length of the side of a cube with a surface area of 150 square inches.

More than 450 students went on a field trip. Ten buses were filled and 5 more students traveled in a car. How many students were on each bus?

The sum of two numbers is 58 the larger number is three more than four times the smaller number find the two numbers