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lozanna [386]
3 years ago
10

the pictograph below shows number of packages of different brand of batteries at a store sold on Fridaywhich statement is best s

upported by the information on the pictograph
Mathematics
1 answer:
Wewaii [24]3 years ago
8 0
I am happy to help... but <span>Please be more specific with your question. </span>
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The sixth-graders at Lester's school got to visit either the science museum or the history museum. 21 students picked the scienc
Lina20 [59]
21 + 28 = 49 students

Ration of history 21 to students 49 =  d)21:49
8 0
3 years ago
*cries* i need help :(
maria [59]

Answer:

choice B

Step-by-step explanation:

the war was fought in paterots homes because they had know were else to go

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2 years ago
Find the area of the parallelogram below.
Murrr4er [49]

The area is 40 because you do 12 times two then eight times two then add the awnsers

7 0
3 years ago
For a data set of the pulse rates for a sample of adult? females, the lowest pulse rate is 39 beats per? minute, the mean of the
Zarrin [17]

Answer:

a) The difference is of 35 beats per minute.

b) So 3.07 standard deviations below the mean.

c) Z = -3.07.

Step-by-step explanation:

Z-score:

In a set with mean \mu and standard deviation \sigma, the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

In this question:

Mean \mu = 74, standard deviation \sigma = 11.4

a. What is the difference between the pulse rate of 39 beats per minute and the mean pulse rate of the? females?

39 - 74 = -35

The difference is of 35 beats per minute.

b. How many standard deviations is that? [the difference found in part? (a)?

|Z| when X = 39. So

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

Z = \frac{39 - 74}{11.4}

Z = -3.07

|Z| = 3.07

So 3.07 standard deviations below the mean.

c. Convert the pulse rate of 39 beats per minutes to a z score.

From item b. above, Z = -3.07.

5 0
2 years ago
Gabrielle is 3 times older than mikhail. the sum of their ages is 80. how old is mikhail
skelet666 [1.2K]
The sum of their ages equals 80.
Gabrielle is 3 times older than Mikhail

Two numbers that have a sum of 80, with one number being 3 times the other are:
Gabrielle’s age: 60
Mikhail’s age: 20

60 + 20 = 80
20 x 3 = 60


Mikhail is 20 years old.

4 0
3 years ago
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