Does Anyone Knows This Pliz Help Me?

Mathematics

1 answer:

Andrew [12]3 years ago

8 0

Answer:

#3) (4/3) pi r^3

(4/3) pi 4^3

(4/3) pi 64

volume = 21.333pi cm^3

#4) (4/3) pi r^3

(4/3) pi 14^3

(4/3) pi 2744

volume = 3658.666pi cm^3

Step-by-step explanation:

hmu for more info

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108 - 271 + 215-_____= -103

kupik [55]

108-271+215-_____=-103
Im going to combine the first thee numbers and replace the blank with a variable, lets use x.
52 - x=-103
now I am going to subtract 52 on both sides to get the variable alone
-x=-155
Im going to multiply both sides to eliminate the negitive in the variable
x=155
If you want to check just plug 155 into the blank
108-271+215-155=-103
-163+215-155=-103
52-155=-103
-103=-103

so after checking work the blank is equal to 155.

5 0

4 years ago

Find the product and simplify.<br> (k+ 4)(-4k – 5)

torisob [31]

The answer is -4k^2 - 21k - 20! so sorry if I’m wrong but it’s the answer I got :>

3 0

3 years ago

a cookie factory uses 1/6 pf a barrel pf oatmeal in each batch of cookies, the factory used 1 1/3 barrels of oatmeal yesterday.

miv72 [106K]

Answer:

5 batches

Step-by-step explanation:

1/6 oatmeal can make 1 batch, so 5/6 makes 5 batches

8 0

3 years ago

Assume the population has a normal distribution. A sample of 25 randomly selected students Has a mean test score of 81.5 With a

Natasha_Volkova [10]

Answer:

The 90% confidence interval for the mean test score is between 77.29 and 85.71.

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution to solve this question.

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 = 25 - 1 = 24

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 24 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.9}{2} = 0.95$ . So we have T = 2.064