yeah I have a few problems that i can't solve. help..
Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do the same job in 45 minutes. Tony can do the same job in 1 ½ hours. How quickly can all three fill the pool together?
What simple interest rate will Susan need to secure to make $2,500 in interest on a $10,000 principal over 5 years?
Two angles of a triangle measure 15° and 85 °. What is the measure for the third angle?
thanks
Hello angel123In one minute, Jim fills 1/30th of the pool; Sue fills 1/45 and Tony 1/90. So in one minute all three together fill
of the pool
So it would take 15 minutes to fill.
The simple interest formula is
where P is the principal, R is the annual % rate of interest and T is the time in years. You know I, P and T in this question. So plug them into the formula, and solve the equation for R. Can you do that?
The angles of any triangle add up to 180°.
Grandad