To get an average score of 80% (out of four exams), a total of 4*80%=320% is needed, so the minimum required for the 4th test is 320-(75+97+60)=88.
To get an average score of 89% (out of four exams), a total of 4*89%=356% is needed, so the maximum required for the 4th test is 356-(75+97+60)=124, which is impossible.
So the next exam grade must range between 88 and 100 to get a grade b in the class.

Hoped I help! Mark brainly it would help<3

5 0

3 years ago

What is the measure of de a: 68 b: 56 c: 85 d: 51

Amiraneli [1.4K]

Can you be more clearly please?

4 0

4 years ago

Show all steps!!!

Lunna [17]

$-\frac{1}{3}\left|1\cdot \left(\frac{1}{2}\right)^2\right|-\frac{2}{3}-2^3-\frac{2}{3}\left|-\frac{1}{2}\right|^3$
$\frac{1}{3}\left|1\cdot \left(\frac{1}{2}\right)^2\right|=\frac{1}{12}$
$\frac{2}{3}\left|-\frac{1}{2}\right|^3=\frac{1}{12}$
$=-\frac{1}{12}-\frac{2}{3}-2^3-\frac{1}{12}$
$=-\frac{53}{6}$

4 0

4 years ago

Item 18 You estimate that a puppy weighs 12 pounds. The actual weight of the puppy is 14 pounds. Find the percent error. Round y

Morgarella [4.7K]

Hi!

First find how much you were off by.

14-12=2

Now set up a proportion and cross multiply to solve.

$\frac{2}{14} \frac{x}{100}$

2 x 100 = 200
200/14 = 14.29

The answer is 14.29%

4 0

3 years ago

Penn foster exam 700109RR​

Penn foster exam 700109RR