Round 639.13787717 to 2 decimal places.

Silver scooter finds that it costs $300 to produce each scooter and the fixed costs are $750. The price is given by p=900-x, where p is the price in dollars at which exactly x scooters will be sold.

A tennis player hits a serve that cannot be returned 45 percent of the time. Out of 300 serves, how many can yiu predict will not be returned?

To qualify for the championship, a runner must complete the race in less than 40 minutes. Use t to represent the time (in minutes) of a runner who qualifies for the championship.

X=3 5x+4y=-9 -x+4y-2z=-25

Solve for x 6-12x = - 54

What is ctg of pi? in numbers what it represents?

A+b=0 ab=-36 what is the value of a-b?

A bag of marbles contains 4 green marbles, 3 blue marbles, 2 red marbles, and 5 yellow marbles. How many possible outcomes are there when choosing a marble from the bag

Last month, Korey's Comics had a gross profit of $2,385 with a monthly revenue of $3,465. Korey expects similar sales this month, but he would like to build up his in-store browsing selection, and purchases an additional assortment of comic books

There was a plate of cookies on the table. Amanda was hungry because she hadn't had breakfast, so she ate half the cookies. Then Beth came along and noticed the cookies. She thought they looked good, so she ate a third of what was left on the plate.