The spoke of wheel reaches from the center of the wheel to its rim. if the circumference of the wheel is 42 inches, how long is each spoke? use 3.14 for pi, and round your answer to the nearest hundredth

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)

286 divided by 457.6 what is the quotient?