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3 years ago

What is (7.2×10^2)(6×10^-7) in scientific notation?

1 answer:

7 0

Multiply the numbers on the left side of the multiplication sign.

7.2 * 6 = 43.2

Combine the exponents attached to the 10s.

2 + (- 7)
2 - 7
- 5

Your scientific notation should be 43.2 x 10⁻⁵.

As a way to check your answer:

7.2 x 10² = 720 (move the decimal to the right twice)

6 x 10⁻⁷ = 0.0000006 (move the decimal to the left 7 times because it's a negative exponent)

Multiply the two together on a calculator, you get 0.000432. If you move the decimal 5 times to the left on 43.2 (again, because it's a negative exponent), you get 0.000432. The answers match.

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10x+3y=19 y=2x+5 help

Murrr4er [49]

10x+3(2x+5)=19
10x+6x+15=19
16x+15=19
16x=4
x=4/16
x=1/4
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3 years ago

Solve for xxx. Write the smaller solution first, and the larger solution second.

____ [38]

Answer:

$x=-5\text{ or }x=2$

Step-by-step explanation:

We have been given an equation $x^2+3x-10=0$ . We are asked to find the solutions of our given equation.

We will use splitting the middle term method to solve quadratic equation.

We will split middle term of our given equation into parts such that whose product is $-10$ and whose sum is 3.

We know that such two numbers are $5\text{ and }-2$ .

$x^2+5x-2x-10=0$

$(x^2+5x)+(-2x-10)=0$

$x(x+5)-2(x+5)=0$

$(x+5)(x-2)=0$

Using zero product property, we will get:

$(x+5)=0\text{ or }(x-2)=0$

$x+5=0\text{ or }x-2=0$

$x=-5\text{ or }x=2$

Therefore, the solutions for our given equation are $x=-5\text{ or }x=2$ .

4 0

3 years ago

Read 2 more answers

3. Standard deviation is ________. a mean of squared differences the square root of the variance unit-free the covariance 4. Sta

Ksenya-84 [330]

Answer:

3. Standard deviation is the square root of the variance.

4. Standard deviation is useful because it has the same units as the underlying data.

Step-by-step explanation:

3. In statistics, the dispersion in a given data with respect to its mean distribution can be determined or measured by standard deviation and variance. The standard deviation of a distribution can also be determined as the square root of variance.

4. Standard deviation is measured in the same units as that of the original data. Thus it has the same units as the underlying data.

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3 years ago

a bag contains 14 red tiles, 20 blue tiles, and 16 green tiles, a tile is randomly drawn from the bag. if this is done 40 times

ololo11 [35]

Total=14+20+16=50
P(blue)=20/50=2/5

so, answer=(2/5)*40=16

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3 years ago

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What is the solution of the system of equations graphed below?

Dahasolnce [82]

Answer: B