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2 years ago

Simplify 10 divided by 7 divided by 8 and put it in a fraction please :)

Mathematics

2 answers:

levacccp [35]2 years ago

7 0

5 over 28 ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ

NeX [460]2 years ago

3 0

Answer:5/28

Step-by-step explanation:

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What is the total perimeter of this figure? Express your answer in feet.

bezimeni [28]

Answer:

i need to see the figure

Step-by-step explanation:

7 0

3 years ago

7L+5r=97<br><br> What’s the answer for both letters?

Kobotan [32]

Answer:

r = 11

L = 6

Step-by-step explanation:

7(6) = 42

5(11) = 55

42 + 55 = 97

8 0

3 years ago

A fossil was analyzed and determined to have a carbon-14 level that is 80 % that of living organisms. the half-life of c-14 is 5

liq [111]

Answer:

The fossil is 1860 years old.

Step-by-step explanation:

The equation for the amount of fossil has the following format:

$Q(t) = Q(0)e^{rt}$

In which Q(t) is the amount after t years, Q(0) is the initial amount and r is the rate of change.

Half-life of c-14 is 5730 years.

This means that $Q(5730) = 0.5Q(0)$

$Q(t) = Q(0)e^{rt}$

$0.5Q(0) = Q(0)e^{5730r}$

$e^{5730r} = 0.5$

$\ln{e^{5730r}} = \ln{0.5}$

$5730r = \ln{0.5}$

$r = \frac{\ln{0.5}}{5730}$

$r = -0.00012$

$Q(t) = Q(0)e^{-0.00012t}$

How old is the fossil?

This is t for which

$Q(t) = 0.8Q(0)$

$Q(t) = Q(0)e^{-0.00012t}$

$0.8Q(0) = Q(0)e^{-0.00012t}$

$e^{-0.00012t} = 0.8$

$\ln{e^{-0.00012t}} = \ln{0.8}$

$-0.00012t = \ln{0.8}$

$t = -\frac{\ln{0.8}}{-0.00012}$

$t = 1860$

The fossil is 1860 years old.

4 0

3 years ago

State the opposite -5x

eimsori [14]

Answer:

Step-by-step explanation:

since opposite of negative is positive

5 0

3 years ago

A rectangular site measures 125 feet (frontage) by 256 feet (depth), of which 26 feet is in the public right of way. what is the

alexandr1967 [171]

Answer:

32,000 square feet gross area and 28,750 square feet net area

Step-by-step explanation:

Given a rectangular site measures 125 feet (frontage) by 256 feet (depth), of which 26 feet is in the public right of way. We have to find the the gross and net site area.

As, 26 feet width is in the public right of way which excluded in the net area but included in gross area.

For gross area,

Length=125 feet

Width=256 feet

$Area=Length\times width=125\times 256=32000 square feet$

For net area,

Length=125 feet

Width=256-26=230 feet

$Area=Length\times width=125\times 230=28750 square feet$

Hence, last option is correct.

The answer is: 32,000 square feet gross area and 28,750 square feet net area

6 0

3 years ago