3 years ago

Plssss help me with this thx im not good at math

1 answer:

8 0

The answer is c 25 minutes btw hope you have a wonderful day

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astraxan [27]

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3 years ago

timama [110]

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erma4kov [3.2K]

4 pounds of books because 60 oz only equals 3.75 pounds.

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shtirl [24]

7.87 is what i got :) good luck!!

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3 years ago

DaniilM [7]

Answer:

The answer is " $\bold{(7.1-8.3) \pm 1.665 \sqrt{\frac{(1.7)^2}{50}+\frac{(1.9)^2}{39}} }\\\\$ "

Step-by-step explanation:

Given values:

$\bar{x_1}=7.1\\\\\bar{x_2}=8.3\\\\s_1=1.7\\\\s_2=1.9\\\\n_1=50\\\\n_2=39$

Using formula:

$\to (\bar{x_1} -\bar{x_2}) \pm t \sqrt{\frac{(s_1)^2}{n_1}+\frac{(s_1)^2}{n_2}} \\\\$

Put the values in the above formula:

$\to (7.1-8.3) \pm 1.665 \sqrt{\frac{(1.7)^2}{50}+\frac{(1.9)^2}{39}} \\\\$

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3 years ago