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irinina [24]
2 years ago
5

Please help! (i'll give the best answer brainliest)

Mathematics
2 answers:
asambeis [7]2 years ago
5 0

Answer:

I think False umm...

i'm so so sorry if im rong

Step-by-step explanation:

zepelin [54]2 years ago
5 0
This statement is in fact true.
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The lengths of pregnancies are normally distributed with a mean of 269269 days and a standard deviation of 1515 days. a. Find th
kati45 [8]

Answer:

a. 0.38%

b. 266.75 days

Step-by-step explanation:

We have the following data, mean (m) 269 and standard deviation (sd) 15, therefore:

a. The first thing is to calculate the number z:

z (x) = (x - m) / sd

z (309) = (309-269) / 15 = 2.67

When looking in the normal distribution table (attached), we have that at this value of z, the probability is:

P (z> 2.67), that is to say we must look in the table -2.67 and this value corresponds to 0.0038, that is to say 0.38%

b. Find the z-value with a left tail of 44%, i.e. 0.44. We look in the table for this value and what value of z corresponds.

invNorm (0.44) = -0.15

Find the corresponding number of days:

x = z * sd + m

we replace

d = -0.15 * 15 + 269 = 266.75 days

7 0
3 years ago
S/4-6.8=-9.8 what does s equal
Hatshy [7]
S/4-6.8=-9.8
S/4= -9.8+6.8
S/4= -3
S=-3*4
S= -12
4 0
3 years ago
Beatrice buys a dishwasher for her new house. The price of the dishwasher is D dollars, and she pays an additional 2% tax. Match
Leya [2.2K]
I think it's D + .2 = ? i'm not sure but it might be something like that
6 0
3 years ago
Anna wants to take fitness classes. She compares two gyms to determine which would be the best deal for her. Fit Fast charges a
mestny [16]
Fit Fast: a set feet per class => y = Ax

Stepping Up: a monthly fee plus an additioal fee per class => h = Bx + C

You can discard the second and the fourth systems because  they do not have the form established from the statement.

The first system produce an obvious result given that is represents an option that is always better than the other 5.5x will be lower than 7.5x + 10 for any positive value of x, and so there is no need to make any comparission.

The third system is

y = 7.5x and y = 5.5x + 10 which need to be solved to determine when one rate is more convenient than the other.

Answer: y = 7.5x and y = 5..5x + 10



4 0
3 years ago
Read 2 more answers
Six ounces is what percent of a pound?
baherus [9]

Answer:

37.5%

Step-by-step explanation:

If you take 6 and divide it by 16, you will get 0.375. You then have to move the decimal two places to the left to get the percentage.

8 0
3 years ago
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