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3 years ago

PLEASE HELP ASAP!! I NEED TO GET MY MATH GRADE UP

Mathematics

1 answer:

olga nikolaevna [1]3 years ago

8 0

Answer:

Step-by-step explanation:

-4 exponent 3 is equal to -64

10 exponent 2 is equal to 100

100- (-64) = 36

36 x 1/4 = 9

hope you get your grade up! <3

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A road crew takes 4/7 of an hour to pave seven miles of road. How long will it take the crew to pave one mile of road? Plz help

Galina-37 [17]

7 miles divided by 4/7 hour

copy dot flip

7 miles * 7/4 hour

49/4 miles/ hour

d = rt

1 miles = 49/4 * t

divide each side by 49/4

1 / (49/4) = t

4/49 =t

it takes 4/49 of an hour

4 0

3 years ago

Cung Pí simplifies

MakcuM [25]

Answer:

sorry PLS the question is not clear I think U missed some parts

6 0

4 years ago

Some sources report that the weights of full-term newborn babies in a certain town have a mean of 8 pounds and a standard devia

Elodia [21]

Answer:

0.682 is the probability that one newborn baby will have a weight within one standard deviation of the mean.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 8 pounds

Standard Deviation, σ = 0.6 pounds

We are given that the distribution of weights of full-term newborn babies is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

P(weight between 7.4 and 8.6 pounds)

$P(7.4 \leq x \leq 8.6) = P(\displaystyle\frac{7.4 - 8}{0.6} \leq z \leq \displaystyle\frac{8.6-8}{0.6}) = P(-1 \leq z \leq 1)\\\\= P(z \leq 1) - P(z < -1)\\= 0.841 - 0.159 = 0.682 = 68.2\%$

$P(7.4 \leq x \leq 8.6) = 6.82\%$

This could also be found with the empirical formula.

0.682 is the probability that one newborn baby will have a weight within 0.6 pounds of the mean.

7 0

3 years ago

There are 565 sheets of paper in a book

Kisachek [45]

565 sheets/ 1 book* 2,000 books= 1,130,000 sheets.

The final answer is 1.13*10^(6) sheets.

Hope this helps~

4 0

3 years ago

miguels physical eduction class lasts for 3/4 of an hour. today they spent 3/4 of that time playing dodge ball. what fraction of

aleksklad [387]

The answer is 9/16

there are two ways you can get this
take 3/4 times 3/4 to get 9/16
or
3/4 of an hour = 45 min and 3/4 of 45 min = 33.75 min and 33.75/60(minutes in an hour) = 9/16

6 0

4 years ago

Read 2 more answers