The temperature went from 90° to 60°. What is the percent decrease? Round to the nearest percent.

Please help with question 22b! Thanks :)

NNADVOKAT [17]

6.5 liters per 100 km travelled. 30% of 5 is 1.5, so adding this to the original amount results in 6.5

8 0

3 years ago

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I know how many line of symmetry but i dont know how to explain how i found the lines so can someone do it for me?

11111nata11111 [884]

2 because there are 4 numbers of edges and 4 vertices

7 0

3 years ago

You want to ship a box that is 10cm wide, 20 cm long and 5 cm high. What is the volume of the box?

asambeis [7]

Answer:

......................... why do people do this?......................... I remember u u did this to me when i needed help so karma ........................................................................................................

Step-by-step explanation:

8 0

2 years ago

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Consider the polynomial function (x+3)(x+9)(x-8)=0. which of the following are zeros of the function? Select all that apply. -9

Crank

Zeros are:

$-3$
$-9$
$+8$

Looks like only $-3$ and $-9$ are offered as answers, though.

6 0

3 years ago

A filling machine fills bottles of nail polish with amounts that are normallydistributed with mean 18 mL and standard deviation

natulia [17]

Answer:

a. 0.2033 = 20.33% probability that one of the randomly selected bottles is filled with less than 17.5mL of nail polish

b. 0.0019 = 0.19% probability that the average fill of the twelve bottles is more than 17.5mL

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .