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velikii [3]
3 years ago
8

Can anyone help me on this one?

Mathematics
2 answers:
sertanlavr [38]3 years ago
7 0

Answer:

6

Step-by-step explanation:

a=1/2 b*h

a=1/2 3*4

a=1/2 12

a=6

:)

Gre4nikov [31]3 years ago
4 0

Answer: B. area = 6

Step-by-step explanation:

Area= 1/2 base x height

Substitute 3 for base and 4 for height.

Area= 1/2(3) x 4

Area= 1.5 x 4

Area = 6

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The time for a professor to grade an exam is normally distributed with a mean of 16.3 minutes and a standard deviation of 4.2 mi
dem82 [27]

Answer:

62.17% probability that a randomly selected exam will require more than 15 minutes to grade

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 16.3, \sigma = 4.2

What is the probability that a randomly selected exam will require more than 15 minutes to grade

This is 1 subtracted by the pvalue of Z when X = 15. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{15 - 16.3}{4.2}

Z = -0.31

Z = -0.31 has a pvalue of 0.3783.

1 - 0.3783 = 0.6217

62.17% probability that a randomly selected exam will require more than 15 minutes to grade

8 0
3 years ago
Will correctly calculated 45 ÷ 6 as 7.5. How can he find 4,500 ÷ 6 without dividing?
Anastasy [175]
Add the zeros on to 7.5 to which you would move the decimal and it should be like this 750.0 or 750
5 0
3 years ago
How do you write 7/10 as a decimal Can someone please help me!!
insens350 [35]

Answer:

0.7

Step-by-step explanation:

To get 7/10 as a decimal you simply divide 7 by 10 which gets you 0.7.

7 0
3 years ago
Marcy bought 10.32 pounds of white potatoes and 12.48 pounds of sweet potatoes. About how many pounds of potatoes did Marcy buy?
zalisa [80]
Marcy bought a total of 22.8 potatoes. 10.32+12.48=22.8
3 0
3 years ago
Please help me with this homework
3241004551 [841]

Answer:

C.

Step-by-step explanation:

The pythagorean theorem shows a^2+b^2=c^2.

a=8, b=15, c= the unknown distance

8^2+15^2=c^2

7 0
2 years ago
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