What is the solution to (3*10^2) * (5*10^5) written in Scientific notation

On Monday from the peak Mount Kilimanjaro a group of mountain climbers descended 3,499 feet. On Tuesday, they descended another 5,262 feet.

Edward works at a grocery store. He kept track of the number of coupons redeemed by the last 20 shoppers. The center of the dot plot was 1. No one redeemed 4 coupons. Most people did not redeem any coupons.

John owns an engine which receives heat input from a reservoir at 600 K and loses heat to a sink at 300 K. What is the maximum possible efficiency of this engine? A. 25 percent B. 50 percent C. 75 percent D. 100 percent

Patrick made $43.00 mowing lawns around his neighborhood. He decided to spend it at the mall. At the music store he bought 4 cd's for $8.99 each he also bought a shirt for $6.00 at old navy how much did he spend at the music store

A powder diet is tested on 49 people and a liquid diet is tested on 36 different people. Of interest is whether the liquid diet yields a higher average weight loss than the powder diet.

Simplify this expression - - (12-4x) + 8 (10-x)

Study the equation:4^x=6 Show work.

Factorise 1) 12x + 15

What is 9.60 rounded to the nearest tenth of a dollar

How many different combinations of three books can be selected from 40 books?