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2 years ago

Find the product. Write your answer in scientific notation. (7 x 10^-2) (8 x 10^5) =

Mathematics

1 answer:

lakkis [162]2 years ago

6 0

Answer:

7×10^(-2)×8×10^5 = 56000

convert to scientific notation = 5.6 × 10^4

(scientific notation)

= 5.6e4

(scientific e notation)

= 56 × 10^3

(engineering notation)

(thousand; prefix kilo- (k))

= 56000

(real number)

Step-by-step explanation:

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Answer:

Step-by-step explanation:

The greatest common factor they share is 4.

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3 years ago

What is the product of 2x-5 and 3x2 + 5x - 7? Write your answer in standard form.

jasenka [17]

Step-by-step explanation:

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3 years ago

.. pls help me....!!!!! Determine whether the point (-2,4) satisfy y<3x+5,y=3x+5 or y >3x+5..

nasty-shy [4]

Answer:

$y > 3\cdot x + 5$

Step-by-step explanation:

Let $A(x,y) = (-2,4)$ and $y = 3\cdot x + 5$ . Now we evaluate the given function at $x = -2$ :

$y = 3\cdot x + 5$ (1)

$y = 3\cdot (-2)+5$

$y = -6 +5$

$y = -1$

Which means that $y$ is less than the y-component of A. Therefore, the right answer is $y > 3\cdot x + 5$ .

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2 years ago

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Zielflug [23.3K]

Answer:

See Explanation

Step-by-step explanation:

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3 years ago

A study showed that 69% of supermarket shoppers believe supermarket brands to be as good as national name brands. To investigate

Valentin [98]

Answer:

We conclude that supermarket ketchup was not as good as the national brand ketchup.

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 100

p = 69% = 0.69

Alpha, α = 0.05

Number of stating that the supermarket brand was as good as the national brand , x = 56

a) First, we design the null and the alternate hypothesis

$H_{0}: p = 0.69\\H_A: p \neq 0.69$

This is a two-tailed test.

b) Formula:

$\hat{p} = \dfrac{x}{n} = \dfrac{56}{100} = 0.56$

$z = \dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

Putting the values, we get,

$z = \displaystyle\frac{0.56-0.69}{\sqrt{\frac{0.69(1-0.69)}{100}}} = -2.810$

Now, we calculate the p-value from the table.

P-value = 0.0049

c) Since the p-value is lower than the significance level, we fail to accept the null and reject it.

Thus, we conclude that supermarket ketchup was not as good as the national brand ketchup.

d) It need to be tested further whether the supermarket brand was worse than the national brand or better than the national brand.

6 0

3 years ago