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3 years ago

6. The expected life of a calculator varies inversely with the amount of times a student

Mathematics

1 answer:

loris [4]3 years ago

6 0

9514 1404 393

Answer:

250 days

Step-by-step explanation:

If the number of drops increases by a factor of 20/8, the expected life will decrease by the inverse of that factor: 8/20.

The expected life is (8/20)(625 days) = 250 days.

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A plane descends 27,500 feet to the ground. If the plane descends at a rate of 275 feet per minute, how long will it take the pl

slava [35]

Answer:

Just take the two zeros to 100

Step-by-step explanation:

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3 years ago

If log2 5 = k, determine an expression for log32 5 in terms of k.

lukranit [14]

Answer:

$log_3_2(5)=\frac{1}{5} k$

Step-by-step explanation:

Let's start by using change of base property:

$log_b(x)=\frac{log_a(x)}{log_a(b)}$

So, for $log_2(5)$

$log_2(5)=k=\frac{log(5)}{log(2)}\hspace{10}(1)$

Now, using change of base for $log_3_2(5)$

$log_3_2(5)=\frac{log(5)}{log(32)}$

You can express $32$ as:

$2^5$

Using reduction of power property:

$log_z(x^y)=ylog_z(x)$

$log(32)=log(2^5)=5log(2)$

Therefore:

$log_3_2(5)=\frac{log(5)}{5*log(2)}=\frac{1}{5} \frac{log(5)}{log(2)}\hspace{10}(2)$

As you can see the only difference between (1) and (2) is the coefficient $\frac{1}{5}$ :

So:

$\frac{log(5)}{log(2)} =k\\$

$log_3_2(5)=\frac{1}{5} \frac{log(5)}{log(2)} =\frac{1}{5} k$

6 0

3 years ago

To form

Andreas93 [3]

Answer:

40 toothpicks

Step-by-step explanation:

3 times 4 equals 12, so I would multiply 10 times 4 and get 40.

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3 years ago

Some countries can not efficiently produce goods because they have old, outdated, machinery. Based on this information, what wou

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Step-by-step explanation:

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3 years ago

A. They will spend $53.97 on 3 pizzas. What is the price of each pizza? Show all your work.

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how much money did they start off with?

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3 years ago