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Kazeer [188]
2 years ago
6

Which statement about 3 multiplied by 23 must be true?

Mathematics
1 answer:
kumpel [21]2 years ago
9 0

Answer:

(C) because the answer is 69

Step-by-step explanation:

you make 3 groups of 23 and u get 69

its greater then 23 and 4

and its not between 3 and 4 or between 23 or 3

so it can only be (C)

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romanna [79]
1. C
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3.A
4.B
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5 0
3 years ago
While Tina is shopping, she finds a pair of pants she wants to buy that is priced at $35 but is on sale for 60% off. What expres
zysi [14]

Answer:

35x.40=14

Step-by-step explanation:

you multply $35 by .40 because that is the remaining cost from 60%

8 0
2 years ago
Read 2 more answers
A news report states that the 99% confidence interval for the mean number of daily calories consumed by participants in a medica
expeople1 [14]

Answer:

The sample mean is of 1925 calories.

The margin of error is of 75 calories.

The sample standard deviation is of 109.7992 calories.

Step-by-step explanation:

Sample mean:

The sample mean is the mean value of the two bounds of the confidence interval. So

M = \frac{1850 + 2000}{2} = 1925

The sample mean is of 1925 calories.

The margin of error

Difference between the bounds and the sample mean. So

2000 - 1925 = 1925 - 1850 = 75 calories.

The margin of error is of 75 calories.

Sample standard deviation:

Here, I am going to expand on the t-distribution.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 18 - 1 = 17

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 17 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.99}{2} = 0.995. So we have T = 2.898

The margin of error is:

M = T\frac{s}{\sqrt{n}}

In which s is the standard deviation of the sample and n is the size of the sample.

Since M = 75, T = 2.898, n = 18

M = T\frac{s}{\sqrt{n}}

75 = 2.898\frac{s}{\sqrt{18}}

s = \frac{75\sqrt{18}}{2.898}

s = 109.7992

The sample standard deviation is of 109.7992 calories.

6 0
2 years ago
At one gas station gas cost $2.75 per gallon write an equation that relates the total cost C to the number of gallons of gas pur
Inessa05 [86]
The answer is $2.75G=C
5 0
3 years ago
Help me thanks please please thanks
enot [183]

Answer:

Area of big circle: 2463.01

Area of little circle: 615.75

Area of shaded space: 1,231.51

Step-by-step explanation:

thats what i came up with

3 0
2 years ago
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