90 men can complete a work in 24 days working 8 hrs a day. how many men are required to complete the same work in 18 days working 15/2 hrs a day

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x

3.4a=57.8 what is the the value of a

Light travels at 186,000 miles per second. light takes about 1 1? 3 seconds to travel from the earth to the moon. calculate the distance between the earth and the moon based on the speed of light.