An element with mass 140 grams decays by 21.6% per minute. How much of the element is remaining after 20 minutes, to the nearest 10th of a gram?

Nine less than a number

You have $100 begging on February 1, 2009, you spend $1 each day. On what day do you spend your last dollar?

Jonele is making a bracelet with red and yellow beads. She alternates 2 red beads with 5 yellow beads. If she needs 16 red beads to complete a bracelet how many yellow beads does she need?

Zachery is solving the equation 3/4 (x - 8) = 12 Which is the best first step to begin to simplify the equation?

Find the difference between (x+7) & (3x+4)

17=14 3/4 + 1/6 + missing number

The world record for the women's 3,000-m steeplechase is 9 min 1.59 s. Find the runner's speed in meters per second. Round answer to the nearest hundredths.

A rectangle has an area of 85 square cm. If the length is 2 more than 3 times its width, find the dimensions of the rectangle

If arrivals occur at a mean rate of 3.6 events per hour, the exponential probability of waiting more than 0.5 hour for the next arrival is:

A multiple number of 7 and divisible by 5 and greater than 55