Question

PLEASE HELP WITH THESE TWO MATH PROBS, ONLY ANSWER IF YOU KNOW!!

1. Divide.

(4.1 x 104) ÷ (1.28 x 10-5)

Express your answer in scientific notation.
A. 3.203 × 10-1
B. 3.203 × 101
C. 3.203 × 109
D. 0.3203 x 1010


2. Add.

(4.9 x 101) + (6.1 x 10-2)

Express your answer in scientific notation.
A. 4.961 x 101
B. 1.1 x 10-1
C. 4.9 x 101
D. 6.59 x 10-2

Answer 1

1. Divide.

(4.1 x 10^4) ÷ (1.28 x 10^-5)
=(4.1÷ 1.28) x 10^9
= 3.203 x 10^9
answer
C. 3.203 × 10^9

2. Add.

(4.9 x 10^1) + (6.1 x 10^-2)
= 4.9061 x 10^1
= 4.9 x 10^1

answer
C. 4.9 x 10^1