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photoshop1234 [79]
2 years ago
7

Sally averaged that she spent about 6.8×10^4 seconds training for her weight lifting competition in the month of May. Write this

time in standard notation.
Mathematics
1 answer:
vivado [14]2 years ago
5 0

Answer:

t = 68000 s

Step-by-step explanation:

Given that,

The average time Sally spent for training for her weight lifting competition in the month of May is 6.8\times 10^4\ s.

We need to write this time in standard notation.

The power of 10 is 4. 10⁴ can be written as 10000.

6.8\times 10^4=\dfrac{68}{10}\times 10000\\\\=68000

So, the standard time is equal to 68000 s.

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In Exercise, use the properties of exponents to simplify the expression.<br> 32(3- 2)
zavuch27 [327]

Answer:

1

Step-by-step explanation:

We have given expression 3^2\times 3^{-2}

We have to simplify the expression with use of property of exponent

According to property of exponent when two functions are multiplied with each other having exponent then their exponent are added to each other

So 3^2\times 3^{-2}=3^{2-2}=3^0

Now according to exponent property if 0 is the exponent of any number then its result will be 1

So 3^0=1

4 0
3 years ago
In order to answer the following question, please use the following image down below:
Novosadov [1.4K]

Answer:

23

Step-by-step explanation:

(x-3)(9) = (10)(18)

9x - 27 = 180

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x = 23

5 0
3 years ago
Emily bought 63 yards of fabric to make curtains.
olganol [36]

Answer:

<u>2268 inches of fabric</u>

Step-by-step explanation:

There are 36 inches in 1 yard. Therefore, we multiply 36 by 63 to get an answer of 2268.

<u>Therefore, Emily bought </u><u>2268</u><u> inches of fabric</u>

7 0
3 years ago
Read 2 more answers
Write and evaluate the definite integral that represents the volume of the solid formed by revolving the region about the x-axis
guapka [62]

Answer: V = \frac{64}{3}\pi

Step-by-step explanation: A solid formed by revolving the region about the x-axis can be considered to have a thin vertical strip with thickness Δx and height y = f(x). The strip creates a circular disk with volume:

V = \pi. y^{2}.Δx

Using the <u>Disc</u> <u>Method</u>, it is possible to calculate all the volume of these strips, giving the volume of the revolved solid:

V = \int\limits^a_b {\pi. y^{2} } \, dx

Then, for the region generated by  y = - x + 4:

V = \int\limits^4_0 {\pi.(-x+4)^{2} } \, dx

V = \pi.\int\limits^4_0 {(x^{2}-8x+16)} \, dx

V = \pi.(\frac{x^{3}}{3}-4x^{2}+16x )

V = \pi.(\frac{4^{3}}{3}-4.4^{2}+16.4 - 0 )

V = \frac{64}{3}.\pi

The volume of the revolved region is V = \frac{64}{3}.\pi

8 0
3 years ago
What is the value of -8 (17-12) over -2(8-(-2))<br><br> A. -4<br> B. -2<br> C. 2 <br> D. 4
Ivan

Answer:

C=2

Step-by-step explanation:

-8(17-12)= -8(5)= -40

then

-2(8-(-2))= -2(10) = -20

so then

-40/-20

=-2

3 0
3 years ago
Read 2 more answers
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