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balandron [24]
3 years ago
7

Belinda git 18 out of 20 correct on a science test what percent of the questions did Belinda get correct

Mathematics
2 answers:
sveta [45]3 years ago
4 0
92% of the questions were correct.
Margarita [4]3 years ago
4 0
Expressed as a percentage, 18/20x100=90 percent
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A closed container has 5.04 ⋅ 1023 atoms of a gas. Each atom of the gas weighs 1.67 ⋅ 10−24 grams.
MatroZZZ [7]

Answer:

The correct option is the last one (0,84 grams, because (5.04 × 1.67) × (10^23 x 10^-24) = 8.4168 x 10^-1))

Step-by-step explanation:

The first step is to think that you have to multiply the number of atoms for the weight of each atom.

When you work with scientific notation, you should solve the operation for numbers and for the ten base. In this case you solve 5.04 x 1.67 and then the product of the ten bases. For this product you have to sum the exponents of the ten base 23 + (-24) = -1.

Summarizing.... 5.04 x 10^23 x 1.67 x 10^-24 = (5.04 x 1.67) x (10^23x10^-24)  ⇒ 5.04 x 10^23 x 1.67 x 10^-24 = 8.4168 x 10^-1

⇒ 5.04 x 10^23 x 1.67 x 10^-24 = 0,84168.

4 0
3 years ago
If the measure of < A is 99 ° and the measure of < B is 81 ° , then < A and < B are _____.
Doss [256]

Answer:

D.supplementary angles

Step-by-step explanation:

81+99=180

6 0
3 years ago
Read 2 more answers
Square root of 21 and square root of 62. must be given into 1 decimal place
blsea [12.9K]

Answer:

square root of 21 is 4.6

square root of 62 is 7.9

Step-by-step explanation:

square root of 21 is 4.6

square root of 62 is 7.9

8 0
3 years ago
if I have to add 97 oz of algaecide to 10,000 gallons of water how much should I add if I only have 200 gallons of water​
juin [17]

Answer:

1.94 oz

Step-by-step explanation:

x/97 = 200/10000

97*200 = 10,000x

19400 = 10,000x

1.94 oz

You can also do it this way:

200/10000 = 0.02

0.02 * 97 = 1.94

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

7 0
3 years ago
Type an equation for the line shown on the graph<br><br> (-2,-3) (2,3)
scoray [572]

Answer:

y = 1.5x

Step-by-step explanation:

5 0
3 years ago
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