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3 years ago

PLEASE HELP FAST! MULTIPLE CHOICE! I HAVE 3 MINUTES! PLEASE SHOW A LITTLE WORK I DONT NEED MUCH!

Mathematics

1 answer:

Ksivusya [100]3 years ago

4 0

Answer:

Step-by-step explanation:

just multiply 8.50 times 4 and all the numbers in the problem

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Need help with b, picture attached.

Vikki [24]

$7500/75=100$
This means that a field of those dimensions would not be the required length of a minimum of 110 feet.

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3 years ago

ladder 5m tall when set against a wall of house just reach the window at a height 3m how far is the lower end of ladder from the

KATRIN_1 [288]

Answer:

Step-by-step explanation:

A simple matter of using Pythagoras. The hypotenuse is the ladder, and one of the legs is the wall, and we have to figure out the value of the other leg.

The Pythagorean formuda is (hypotenuse = a): a² + b² = c² (b and c are the other sides)

applying the values: a = 5 and b or c is 3 (I'll put b = 3)

5² = 3² + c²

25 = 9 + c²

25 - 9 = c²

16 = c²

√16 = c

4 = c

c = 4

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3 years ago

When factored completely, <br> X^3-7x^2-30x

sweet-ann [11.9K]

Answer:

x(x+3)(x−10)

Step-by-step explanation:

Hope this was helpful let me know if it was!

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3 years ago

in one study of smokers who tried to quit smoking with nicotine patch therapy 39 were smoking one year

andrey2020 [161]

Answer:

Step-by-step explanation:

8 0

3 years ago

certain computer virus can damage any file with probability 35%, independently of other files. Suppose this virus enters a folde

Ksivusya [100]

Answer:

0.623 is the probability that between 800 and 850 files get damaged.

Step-by-step explanation:

We are given the following information:

We treat virus can damage computer as a success.

P( virus can damage computer) = 35% = 0.35

The conditions for normal distribution are satisfied.

By normal approximation:

$\mu = np = 2400(0.35) = 840\\\sigma = \sqrt{np(1-p)} = \sqrt{2400(0.35)(1-0.35)} = $$23.36$

We have to evaluate probability that between 800 and 850 files get damaged.

$P(800 \leq x \leq 850) = P(\displaystyle\frac{800 - 840}{23.36} \leq z \leq \displaystyle\frac{850-840}{23.36}) = P(-1.712 \leq z \leq 0)\\\\= P(z \leq 0.428) - P(z < -1.712)\\= 0.666 - 0.043 = 0.623 = 62.3\%$

$P(800 \leq x \leq 850) = 62.3\%$

0.623 is the probability that between 800 and 850 files get damaged.

8 0

3 years ago