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LenaWriter [7]
2 years ago
11

I need help with this if you get it right I will mark you brainlest

Mathematics
1 answer:
laiz [17]2 years ago
8 0
The correct answer is A!

A. 1/2 is equal to .5 so multiply 2,000 by .5 and you’ll get $1000. She spends $900 on rent. Since $900 is less than $1000 she is not spending more than half of her income on rent. There for this statement is False

B. If you do 2,000 multipled by .15 (which equals 15%) then you’ll get $300 and that’s how much she spends on savings. So this statement is true.

C. 1/4 = .25 so if you do 2,000 multiplied by .25 you’ll end up with $500. The total cost of utilities, cable and groceries ( 120 + 80 + 320 ) = $520 and since $500 is less than $520 then she is spending more than 1/4 of her income on those expenses. Which makes this statement true.

D. 14% is = .14 so if you do 2,000 multiplied by .14 you’ll get $280. The total of cell phone and other expenses ( 100 + 180 ) = $280 so that is true.
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What do you mean by solve?
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3 years ago
It is assumed that the test results for a class follow a normal distribution with a mean of 78 and a standard deviation of 36. I
HACTEHA [7]

Answer:

0.7143

- You know the minimum possible grade of the student

- You want to find out the probability that that grade which is greater than 72 is also greater than 84

- Expect the answer to be 0.7143

- The explanation/steps is given below

- The answer seems (and is) reasonable. You only created a new lower limit.

Step-by-step explanation:

Distribution Type: Normal

Mean: 78

Standard deviation: 36

Range of marks: [78 - 36], [78 + 36]  = [42 to 114]

If you know that a student's grade is greater than 72, what is the probability that it's greater than 84?

In this case, the full probability level is between 72 and the upper limit of 114 (instead of between 42 and 114). First, find the fraction of this probability.

[114 - 72] ÷ [114 - 42]  = 42/72  = 0.5833

So, the probability of a student's mark falling between 72 and 114 is 0.5833.

Now making this a whole interval, 114 - 72 = 42

What fraction of this interval of 42 will bear marks between 84 and 114?

[114 - 84]  = 30

30/42  = 0.7143

Because of the first part of the question "If you know (are sure) that a student's grade is greater than 72...", your answer stops at 0.7143, since 72 was used as the lower limit.

8 0
2 years ago
What is the area of `∆STR`?
Sonja [21]

Answer:

its 30 a

Step-by-step explanation:

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3 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=%20%5Ctimes%20%20%2B%208%20%5Cgeqslant%20%209" id="TexFormula1" title=" \times + 8 \geqslant
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<em />

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3 years ago
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Recall that in a right-triangle, the hypotenuse, or longest side, is √(a²+b²).

\bf \sqrt{4.1^2+6.2^2}\qquad \approx\qquad 7.43303437&#10;\\\\\\&#10;\sqrt{40^2+60^2}\qquad \approx\qquad 72.1110255&#10;\\\\\\&#10;\sqrt{3.2^2+5.4^2}\qquad \approx\qquad 6.27694193&#10;\\\\\\&#10;\sqrt{33^2+56^2}\qquad =\qquad 65

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