Charles is 1/4 as old as his father. If the sum of their ages is 45 years, how old is each?

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ac=26 and ch=8, find bh.

If the car had not hit the fence, how much farther would it have skidded? solve the skid-distance formula to find the extra distance that the car would have traveled if it had not hit the fence. round your answer to two decimal places. note that unit conversion is built into the skid distance formula, so no unit conversions are needed.