Question

There are (32)4 ⋅ 30 bacteria in a petri dish. What is the total number of bacteria in the dish?

38
39
311
324

Answer 1

@DanJS

Answer 2

@Michele_Laino

Answer 3

use ^ for exponents
like 2 to the 3rd power would be 2^3

Answer 4

\[\huge\rm (3^2)^4 \times 3^0\] like this ?

Answer 5

6561

Answer 6

anything to the zero power equal to one \[\huge\rm x^0 =1~~~~(Anything)^0=1\]

Answer 7

don't use calculator !

Answer 8

exponent rule \[\huge\rm (x^m)^n = x^{m \times n}\] just multiply the exponents
base would stay the same

Answer 9

I GOT IT ITS a THANKS

Answer 10

sorry, just saw this ... i can't tell what the question actually is in order to get one of those answers

Answer 11

your answer choices are
3^8
3^9
3^(11)
3^(24)

Answer 12

its A BUT CAN U HELP ME WITH THIS ONE

Answer 13

oh, haha, right on sorry

Answer 14

What is the simplified expression for 2 power 2 multiplied by 2 power 3 over 2 power 4?

20
21
22
23

Answer 15

i tried all power combinations for the expression, but not the answers...

Answer 16

\[\huge\frac{ 2^2 * 2^3 }{ 2^4 }\]

Answer 17

since they all have the same base 2, and multiplied, you can combine that into a single term 2^ (power)

Answer 18

have to memorize and practice a little the like 4 general power rules...

Answer 19

SO ITS C?

Answer 20

http://www.rapidtables.com/math/number/exponent.htm

scroll to the table, the first 5 riles is prolly good

Answer 21

rules

Answer 22

numerator, multiplying like bases, add the powers together

Answer 23

2^5 / 2 ^4

Answer 24

to move the bottom to the top, change the sign on the exponent, then use the addition of powers again

Answer 25

\[\huge\rm x^m \times x^n=x^{m+n}\] when we multiply same bases we should `ADD` their exponents

and when you divide them you should `subtract` ther exponents \[\huge\rm \frac{ x^m }{ x^n }=x^{m-n}\]

Answer 26

2^5 * 2^(-4)

Answer 27

= 2 or 2^1

Answer 28

haha, you have those latex things saved for all the basic things?

Answer 29

it B

Answer 30

A closed container has 3.06 ⋅ 1023 atoms of a gas. Each atom of the gas weighs 1.67 ⋅ 10–24 grams. Which of the following shows and explains the approximate total mass, in grams, of all the atoms of the gas in the container?

0.47 grams, because (3.06 + 1.67) ⋅ (1023 ⋅ 10–24) = 4.73 ⋅ 10–1
0.51 grams, because (3.06 ⋅ 1.67) ⋅(1023 ⋅ 10–24) = 5.1102 ⋅ 10–1
4.73 grams, because (3.06 + 1.67) ⋅ (1023 ⋅ 10–24) = 4.73
5.11 grams, because (3.06 ⋅ 1.67) ⋅ (1023 ⋅ 10–24) = 5.1102

Answer 31

ok, you good on those rules now

Answer 32

i just need help with couple more lol

Answer 33

A closed container has 3.06 ⋅ 1023 atoms of a gas. Each atom of the gas weighs 1.67 ⋅ 10–24 grams. Which of the following shows and explains the approximate total mass, in grams, of all the atoms of the gas in the container?

0.47 grams, because (3.06 + 1.67) ⋅ (1023 ⋅ 10–24) = 4.73 ⋅ 10–1
0.51 grams, because (3.06 ⋅ 1.67) ⋅(1023 ⋅ 10–24) = 5.1102 ⋅ 10–1
4.73 grams, because (3.06 + 1.67) ⋅ (1023 ⋅ 10–24) = 4.73
5.11 grams, because (3.06 ⋅ 1.67) ⋅ (1023 ⋅ 10–24) = 5.1102

Answer 34

i-c