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2 years ago

42,000 as a multipul of a power of 10

Mathematics

1 answer:

MrRa [10]2 years ago

3 0

Answer:

$4.2 \times {10}^{4}$

Step-by-step explanation:

$42000 = 4.2000 \times \times {10}^{4} \\ = 4.2 \times {10}^{4}$

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A survey of 102 high school students on the amount of money they spend on prom yields an average of $893. Assuming the populatio

Mnenie [13.5K]

Answer:

Margin of error $=E=[69]$

Step-by-step explanation:

Data provided in the question:

$\bar{x}=\$\ 893$

$\sigma=\$\ 450$

$n=102$

At $88 \%$ confidence level the $z$ is.

$\alpha=1-88 \%=1-0.88=0.12$

$\frac{\alpha}{2}=\frac{0.12}{2}=0.06$

$z_{\frac \alpha 2}=20.06=1.555$

$\text { Margin of error }=E=Z_{\frac \alpha 2} \times \frac{\sigma}{\sqrt{n}}$

$E=1.555 \times \frac{450}{\sqrt{102}}$

Margin of error $=E=[69]$

7 0

3 years ago

William can eat 17 hot dogs in 5 minutes. If he continues to eat at the same rate, how long will it take him to eat 68 hotdogs.

lidiya [134]

Answer:

20 Minutes

Step-by-step explanation:

First find out how many he eats per minute. 17/5 = 3.4

Then multiply 3.4 by all the answers until you get the right answer.

5 0

2 years ago

Finish the sequence of 10 numbers 2,27,52

Kay [80]

Step-by-step explanation:

2,27, 52, 77, 105, 130, 155, 180, 205 230, 255, 280, 305

4 0

1 year ago

(a) Suppose one house from the city will be selected at random. Use the histogram to estimate the probability that the selected

Mila [183]

Answer:

a) 0.71

b) 0.9863

Step-by-step explanation:

a. Given the mean prices of a house is $403,000 and the standard deviation is $278,000

-The probability the probability that the selected house is valued at less than $500,000 is obtained by summing the frequencies of prices below $500,000:

$P(X$

Hence, the probability of a house price below $500,000 is 0.71

b. -Let X be the mean price of a randomly selected house.

-Since the sample size 40 is greater than 30, we assume normal distribution.

-The probability can therefore be calculated as follows:

$P(X$

Thus, the probability that the mean value of the 40 houses is less than $500,000 is 0.9863

8 0

3 years ago

Determine the x- and y- intercepts for the graph defined by the given equation.

777dan777 [17]

Answer:

y-intercept is (0,8)

c. x-intercept is (-8, 0)

Step-by-step explanation:

y=x+8

x=0

y+0=8

y=8

y=0

y=x+8

0=x+8

x=-8

7 0

2 years ago

Read 2 more answers