A game is on sale for 25% off. If the original price is $40, how much will the game cost? Question 3 options: $10 $20 $25 $30

Mathematics

2 answers:

jok3333 [9.3K]3 years ago

8 0

The game would cost $30.

Sergio039 [100]3 years ago

6 0

Hello there! You get 25% off on the game, but even with that, you still pay 75% of the original price. To find out the new cost of the game, all you have to do is multiply 40 * 75%. 40 * 75% (0.75) is 30. There. The game will cost $30. The answer is D: $30.

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The distribution of resistance for resistors of a certain type is known to be normal, with 10% of all resistors having a resista

baherus [9]

Answer:

The mean is 9.65 ohms and the standard deviation is 0.2742 ohms.

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.

10% of all resistors having a resistance exceeding 10.634 ohms

This means that when X = 10.634, Z has a pvalue of 1-0.1 = 0.9. So when X = 10.634, Z = 1.28.

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

$1.28 = \frac{10.634 - \mu}{\sigma}$