Question

Stephen evaluated (6.34 times 10 Superscript negative 7 Baseline) (4.5 times 10 Superscript 3 Baseline). His work is shown below. Which two statements describe the errors Stephen made? (6.34 times 10 Superscript negative 7 Baseline) (4.5 times 10 Superscript 3 Baseline). (6.34 times 4.5) (10 Superscript negative 7 Baseline times 10 Superscript 3 Baseline). 28.53 times 10 Superscript negative 4 Baseline. Negative 28.53 times 10 Superscript 4 Baseline. Negative 2.853 times 10 Superscript 3 Baseline.

Answer 1

Its A and B

Step-by-step explanation:

1)He changed the sign of the coefficient. A negative exponent does not affect the sign of a coefficient in scientific notation. The sign of the exponent determines the direction the decimal is moved in.

2)He rewrote Negative 28.53 times 10 Superscript 4 incorrectly; 28.53 times 10 Superscript 4 Baseline = 2.853 times 10 Superscript 5. The exponent is increased to account for the extra place the decimal is moved.

Answer 2

The step 4 and 5 describe the errors Stephen made.

Explanation:

Given : Stephen evaluated
`(6.34* 10^(-7))(4.5* 10^3)`. His work is shown below.

To find : Which two statements describe the errors Stephen made?

Solution :

Step 1 -
`(6.34* 10^(-7))(4.5* 10^3)`

Step 2 -
`(6.34* 4.5)(10^(-7)* 10^3)`

Step 3 -
`(28.53)(10^(-4))`

Step 4 -
`28.53* 10^(4)`

Error is the step as 4 sign is negative.

So correct step is
`28.53* 10^(-4)`

Step 5 -
`28.53* 10^(3)`

Error is the step as there is 4 in place of 3.

So correct step is
`28.53* 10^(-4)`

The step 4 and 5 describe the errors Stephen made.