All categories

3 years ago

Zach got 3 questions wrong on a 40 question test. What percent of the test did he get correct

Mathematics

2 answers:

slava [35]3 years ago

8 0

92.5%
You divide 37 by 40
Then add 100

adelina 88 [10]3 years ago

6 0

0.03 x 40... or its either the other way around like 0.02 x 40 lol

You might be interested in

Which number is the best approximation of the square root of 300 to the nearest tenth?

frozen [14]

√300= 17.3205080757

ANSWER: The best approximation
of the square root of 300 rounded to the nearest tenth is 17.3.

Hope this helps! :)

5 0

3 years ago

What is the answer??? Please help me! 16% of 40 =

Murrr4er [49]

Answer:

16/100*40

32/2

lol so simple

5 0

3 years ago

Candy selling at $6.00 per pound will be mixed with candy selling at $9.00 per pound. How many pounds of the more expensive cand

Bezzdna [24]

Well you need the mixture to start off by equalling $7, no matter what weight it is. The mean of two $6 candies and one $9 candy is $7 (6+6+9 = 21, 21/3 = 7)
So the ratio of 2:1 6$:9$ makes $7

Add 2 and 1 to get 3, 15/3 = 5, and because you're working out how much you need for the $9 candy, 5*1 (Because of the 2:1 ratio) is 5
She needs 5 pounds worth of the 9$ candy

8 0

3 years ago

Suppose the life of a particular brand of laptop battery is normally distributed with a mean of 8 hours and a standard deviation

Ierofanga [76]

Answer:

4.75% probability that the battery will last more than 9 hours before running out of power

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 8, \sigma = 0.6$

What is the probability that the battery will last more than 9 hours before running out of power g

This is 1 subtracted by the pvalue of Z when X = 9. So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{9 - 8}{0.6}$

$Z = 1.67$

$Z = 1.67$ has a pvalue of 0.9525

1 - 0.9525 = 0.0475

4.75% probability that the battery will last more than 9 hours before running out of power

4 0

3 years ago

Plz help answer fast irrelevant answers will be reported

Diano4ka-milaya [45]

Answer:

$1+\sqrt{2}\\$ , $1.5-\sqrt{2}$ , $\sqrt{2} -1$ , $\sqrt{2}-1 , 0.15+\pi /1000 , \sqrt{2} +0.001$ $2.357+\pi /1000000$ $0.0001+\pi /10000000$ and I think you got it, just add to the smaller one $\pi /10000000000000\\$

Step-by-step explanation:

not much to explain, it ןs irrational because $\sqrt{2} and \pi$ arent rattional.

5 0

3 years ago