Multiply. (2.1×10^2)×(3.5×10^5) select the answer choice correctly written in scientific notation. a. 5.6×10^7 b. 7.35×10^7 c. 5.6×10^10 d. 7.35×10^10

Hello!

To find the simplified expression in scientific notation, we need to multiply 2.1 and 3.5 together, and add the powers together as well.

We add the powers together using the product rule. The product rule says that if there are two exponents with the same base, you add their powers together. This rule can be shown with this: .

2.1 × 3.5 = 7.25

10^2 + 10^5 = 10^7

Therefore, the simplified expression written in scientific notation is 7.35 × 10^7, which is choice B.

i don't even know man. edge inuity be messing with us. i had to ask a question too.

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: