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4 years ago

14

jamal runs 1 2/5 miles a day to train a race. If he runs the same distance for 3 days a week, what is the distance he runs in on

e week?

1 answer:

podryga [215]4 years ago

7 0

1 2/5 x 3 = 4 1/5 miles

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Factor to the prime factors: 20

Margarita [4]

$20 = 2 * 10 = 2 * 2 * 5 = \bf 2^2 * 5$

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4 years ago

Big chickens: According to a poultry industry news website, the weights of broilers (commercially raised chickens) are approxima

PtichkaEL [24]

Answer: Yes , it is unusual for a boiler to weigh more than 1550 grams .

Step-by-step explanation:

Given : Big chickens: According to a poultry industry news website, the weights of broilers (commercially raised chickens) are approximately normally distributed with mean $(\mu)$ 1358 grams and standard deviation $(\sigma)$ 161 grams.

When the probability that broiler weigh more than 1550 grams < 0.5 , then is unusual otherwise not.

Let x denotes the weight of broiler, then the probability that broiler weigh more than 1550 grams :-

$P(x>1550)=1-P(x\leq1550)\\\\=1-P(\dfrac{x-\mu}{\sigma}\leq\dfrac{1550-1358}{161})\\\\\approx 1-P(z\leq1.19)\ \ [\because\ z=\dfrac{x-\mu}{\sigma}]\\\\=\\\\=1-0.8830\ \ [\text{By using z-table}]\\\\=0.117$

Since 0.117<0.5

Therefore, it is unusual for a boiler to weigh more than 1550 grams .

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4 years ago

A cylinder has a height of 11 centimeters and its circle bases have a radius of 9 centimeters. Find the surface area of the cyli

klemol [59]

The surface area of the cylinder should be 1130.97. I found this by using the formula a=2πrh+2πr2.

Good luck my bud.

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3 years ago

Tyler's father is a used car salesman. He receives 5% commission for every car he sells. How much commission does he earn if he

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Answer:

$23,100

Step-by-step explanation:

First you find 5% of 22,000 which is 1,100. You earn commission so you add 1,100 to 22,000. Therefore getting your answer of $23,100.

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3 years ago

I need help with my algebra 2. I also want to know how to solve this.

Lisa [10]

Add 1 to both sides:

$\sqrt{x+3} = x+1$

In cases like this, we have to remember that a root is always positive, so we can square both sides only assuming that

$x+1 \geq 0 \iff x \geq -1$

Under this assumption, we square both sides and we have

$x+3 = (x+1)^2 \iff x+3 = x^2+2x+1 \iff x^2+x-2 = 0$

The solutions to this equation are

$x = -2,\ x=1$

But since we can only accept solutions greater than -1, we discard $x=-2$ and accept $x=1$ .

In fact, we have

$x=-2 \implies \sqrt{-2+3}-1=0\neq -2$

and

$x=1 \implies \sqrt{4}-1=1$

which is the only solution.

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4 years ago