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3 years ago

A scuba diver dove 18 ft below the

Mathematics

2 answers:

Vlada [557]3 years ago

6 0

Answer:

42 ft

Step-by-step explanation:

18 plus 24 equals 42 feet

Setler79 [48]3 years ago

5 0

Hello!

Let's start from the very beginning. He starts at sea level. This would make his elevation 0 feet.

Then, he dives 18 feet downwards. This would decrease his elevation by 18 feet, making it 18 feet below sea level.

Finally, he dives 24 feet downwards. This would decrease his elevation by another 24 feet. 24 feet below 18 feet below sea level would be 42 feet below sea level, as -18 - 24 = -42.

Therefore, your final answer is 42 feet below sea level.

Hope this helps!

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2 years ago

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maksim [4K]

Answer:

The 95% CI for the difference of means is:

$-155.45 \leq \mu_1-\mu_2 \leq -44.55$

Step-by-step explanation:

<em>The question is incomplete:</em>

<em>"Find a 95% confidence interval on the difference of the towels mean absorbency produced by the two processes. Assumed that the standard deviations are estimated from the data. Round to two decimals places."</em>

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The difference of the sample means is:

$M_d=M_1-M_2=200-300=-100$

The standard deviation can be estimated as:

$\sigma_d=\sqrt{\frac{\sigma_1^2}{n_1}+\frac{\sigma_2^2}{n_2}}\\\\\sigma_d=\sqrt{\frac{15^2}{10}+\frac{50^2}{4}} =\sqrt{22.5+625}=\sqrt{647.5}=25.45$

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step by step explanation

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