What is the product of 3.4 × 10−14 and 1.8 × 10^28?
a)6.12 × 10^14
b) 9.4 × 10^14
c) 5.2 × 10^42
d)6.12 × 10^42

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

Solve 2x+y=3 x+y=5 in substitution method

It is saturday morning and jeremy has discovered he has a leak coming from the water heater in his attic. since plumbers charge extra to come out on the weekends, jeremy is planning to use buckets to catch the dripping water. he places a bucket under the drip and steps outside to walk the dog. in half an hour the bucket is 1/5 of the way full. what is the rate at which the water is leaking per hour?