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3 years ago

13

Andres found out that his experimental probability of getting a hit is 40%. Out of 350 at bats, about how many hits could he pre

dict he would make?

1 answer:

Firlakuza [10]3 years ago

6 0

Answer:

140?

Step-by-step explanation:

40 percent of 350 is 140 so I assume its 140.

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(-2/5)7÷(-2/5)5=????

Harman [31]

Answer:

$\frac{4}{25}$

Step-by-step explanation:

Using the rule of exponents

$a^{m}$ ÷ $a^{n}$ ⇔ $a^{(m-n)}$

Given

$-2/5)^{7}$ ÷ $(-2/5)^{5}$

= $(-2/5)^{(7-5)}$

= $(-2/5)^{2}$

= - $\frac{2}{5}$ × - $\frac{2}{5}$ = $\frac{4}{25}$

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3 years ago

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A student draws two parabolas both parabolas cross the x axis at (-4,0) and (6,0) the y intercept of the first parabolas is (0,-

faust18 [17]

Answer:

The positive difference between the a values is 0.5

Step-by-step explanation:

we know that

Both parabolas cross the x axis at (-4,0) and (6,0)

so

The general equation is

$y=a(x+4)(x-6)$

<em>Find the value of a in the first parabola</em>

The y-intercept is (0,-12)

so

For $x=0, y=-12$

substitute

$y=a(x+4)(x-6)$

$-12=a(0+4)(0-6)$

$-12=a(-24)$

$a=0.5$

<em>Find the value of a in the second parabola</em>

The y-intercept is (0,-24)

so

For $x=0, y=-24$

substitute

$y=a(x+4)(x-6)$

$-24=a(0+4)(0-6)$

$-24=a(-24)$

$a=1$

<em>Find the positive difference between the a values for the two functions</em>

so

$1-0.5=0.5$

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3 years ago

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A machine can make a box in 1 3/10 seconds how many boxes can a machine make in an hour

VikaD [51]

Answer:

Step-by-step explanation:

2769 because there is 3600 seconds in an hour and when you divide it by 1.3 seconds you get 2769.23076923

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3 years ago

What is the fraction and the percent of the shaded part in each square?

elena-14-01-66 [18.8K]

Answer:

Part a) The fraction is $\frac{5}{9}$

Part b) The percent is $55\frac{5}{9}\%$

Step-by-step explanation:

Part a)

Find the fraction

we know that

To find the fraction of the shaded part in the square divide the number of shaded squares by the total number of squares

so

Let

x-------> the number of shaded squares

y-------> the total number of squares

f-------> the fraction of the shaded part

so

$f=\frac{x}{y}$

In this problem we have

$x=20\ shaded\ squares$

$y=36\ total\ squares$

substitutes

$f=\frac{20}{36}$

Simplify

$\frac{20}{36}=\frac{5}{9}$

Part b) Find the percent

To find the percent multiply the fraction by 100

so

$\frac{5}{9}*100=\frac{500}{9}\%$

convert to mixed number

$\frac{500}{9}=\frac{495}{9}+\frac{5}{9}=55\frac{5}{9}\%$

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3 years ago

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Calculate the volume of the cylinder.<br> 4 cm<br> 10 cm<br> Use = 3.14.

Ymorist [56]

Volume is approximately 502.65 cm^2

6 0

3 years ago