An instructional video is 1.8 minutes long. How long is the video in seconds? How long is it in hours?

Mathematics

1 answer:

mel-nik [20]3 years ago

4 0

Answer:

108 seconds and 0.03 hours

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Whats the answer to x+4=-x-4

alukav5142 [94]

Whats the answer to x+4=-x-4

x+4=(-x)-4

Answer -

Let's solve your equation step-by-step.

x+4=−x−4

Step 1: Add x to both sides.

x+4+x=−x−4+x

2x+4=−4

Step 2: Subtract 4 from both sides.

2x+4−4=−4−4

2x=−8

Step 3: Divide both sides by 2.

2x/2 =

−8/2 =

x=−4

Answer:

x=−4

8 0

2 years ago

The annual salaries of all employees at a financial company are normally distributed with a mean of $34,000 and a standard devia

lora16 [44]

z-score of a company is 5.

What is z- test?

A z-test is a statistical test used to determine whether two population means are different when the variances are known and the sample size is large.

The annual salaries of all employees at a financial company are normally distributed with a mean of $34,000 and a standard deviation of $4,000.

Now, using z- score

z= (x- $\mu$ )/ $\sigma$