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3 years ago

jhon made a 77% on his science test. if he answered 34 questions correctly, how many questions were on the test?

2 answers:

7 0

34 77 let x = the amount of questions on the test.
--- = -----
x 100

Cross multiply, you will get 77x = 3400
Divide both sides by 77.
You will get 44.155 which rounds to 44 questions. I hope I helped, I tried my best to answer.. I may not be correct but I am moderately sure of my answer

Juliette [100K]3 years ago

7 0

The answer would be 44 questions on the test.

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NEED HELP ASAP!! ANSWER A THROUGH F PLEASE!!

Verdich [7]

Answer:

A. 12

B. 4

C. 10

D. 8

E. 36

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2 years ago

The table shows the results of a poll of 200 randomly selected juniors and seniors who were asked if they attended prom. Find th

Zielflug [23.3K]

Answer:

(a) $\frac{7}{25}$

(b) $\frac{19}{116}$

Step-by-step explanation:

Number of juniors who attended prom,n(J)=28

Number of seniors who attended prom,n(S)=97

Total of those who attended prom=125

Number of juniors who did not attend prom,n(J')=56

Number of seniors who did not attend prom,n(S')=19

Total of those who attended prom=75
Total Number of students=200

(a) P (a junior who did not attend prom)

$P(J')=\frac{56}{200}= \frac{7}{25}$

(b)

$P(Senior)=\frac{116}{200}$

$P ($did not attend prom$ | senior)=\frac{\text{P(seniors who did not attend prom)}}{P(Senior)} \\=\frac{19/200}{116/200} \\=\frac{19}{116}$

(c)P (junior | attended prom)

$P(Senior)=\frac{84}{200}$

$P (Junior|$ attended prom$)=\frac{\text{P(juniors who attended prom)}}{P(\text{those who attended prom)}} \\=\frac{28/200}{125/200} \\=\frac{28}{125}$

3 0

2 years ago

Read 2 more answers

A store sells

Fittoniya [83]

Answer:

Step-by-step explanation:

Total number of packages = 12

Each package contains 3 pens

SO we can write the equation as follows

3 * 12 = 36

so the total no of pens in a box = 36

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3 years ago

A cylindrical can of soup has a height of 4 inches and a radius of 2 inches. What is the volume of the can? Round to the nearest

nordsb [41]

Answer:

50.29 cubic inches.

Step-by-step explanation:

Volume = 50.28571428571424

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2 years ago

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The speed of light is approximately 299,000,000 meters per second.

jek_recluse [69]

Answer:

2.99 x 10⁸ meters per second

Step-by-step explanation:

Scientific notation (also called "Standard form") is written in the form of $a \times 10^n$ , where $1\leq a < 10$ and $n$ is any positive or negative whole number.

To convert a number into scientific notation, move the decimal point to the left or right until there is one digit before the decimal point.

The number of times you have moved the decimal point is the power of 10 ( $n$ ).

If the decimal point has moved to the left, the power is positive.

If the decimal point has moved to the right, the power is negative.

To convert the given number to scientific notation

The decimal point for the given number 299000000 is after the last zero:

⇒ 299000000.

Move the decimal point 8 places to the left:

⇒ 2.99000000

Get rid of the redundant zeros:

⇒ 2.99

Multiply by 10 to the power of the number of decimal places moved:

⇒ 2.99 x 10⁸

Therefore, the speed of light using scientific notation is:

2.99 x 10⁸ meters per second

7 0

1 year ago