Question

HELP NEED ANSWER PLEASE!!!!! 20 ponts!!!!!!

Answer 1

oh! i know this one!

its A!

good luck!

Answer 2

Answer:

$(2\times 10^{-3})\times (4\times 10^4)=4\times 10^1$

Step-by-step explanation:

We have been given that a mustard seed has a mass about 0.002 gm. A glass jar contains about  $4.3602\times 10^4$ seeds. We are asked to find the mass of mustard seeds in the jar.      

First of all, we will convert the mass of mustard seed in scientific notation.

$0.002=2\times 10^{-3}$

To find the mass of seeds in jar, we will multiply number of seeds by mass of one seed.

$\text{Mass of seeds in jar}=2\times 10^{-3}\times 4.3602\times 10^4$

Using exponent property $a^b\cdot a^c=a^{b+c}$, we will get:

$\text{Mass of seeds in jar}=2\times 4.3602\times 10^{-3+4}$

$\text{Mass of seeds in jar}=8.7204\times 10^{1}$

Therefore, option C is the correct choice.