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1 year ago

Find the result of 765 times 95 divided by 5?please help me

Mathematics

1 answer:

Marizza181 [45]1 year ago

7 0

Answer:

14,535

Step-by-step explanation:

765 times 95 : 765 x 95 = 72,675

divided by 5 : $\frac{ 72,675}{5} = 14,535$

Let me know if you want an even more in-depth answer

Happy to do so !

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The answer is D. The grand total for 12th graders is 68. Divide the 28 students in 12th grade who prefer math by the grand total to get you a rounded answer of 0.412.

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3 years ago

A sample of a radioactive substance decayed to 97% of its original amount after a year. (Round your answers to two decimal place

Andrej [43]

Answer:

a) The half life of the substance is 22.76 years.

b) 5.34 years for the sample to decay to 85% of its original amount

Step-by-step explanation:

The amount of the radioactive substance after t years is modeled by the following equation:

$P(t) = P(0)(1-r)^{t}$

In which P(0) is the initial amount and r is the decay rate.

A sample of a radioactive substance decayed to 97% of its original amount after a year.

This means that:

$P(1) = 0.97P(0)$

Then

$P(t) = P(0)(1-r)^{t}$

$0.97P(0) = P(0)(1-r)^{0}$

$1 - r = 0.97$

$P(t) = P(0)(0.97t)^{t}$

(a) What is the half-life of the substance?

This is t for which P(t) = 0.5P(0). So

$P(t) = P(0)(0.97t)^{t}$

$0.5P(0) = P(0)(0.97t)^{t}$

$(0.97)^{t} = 0.5$

$\log{(0.97)^{t}} = \log{0.5}$

$t\log{0.97} = \log{0.5}$

$t = \frac{\log{0.5}}{\log{0.97}}$

$t = 22.76$

The half life of the substance is 22.76 years.

(b) How long would it take the sample to decay to 85% of its original amount?

This is t for which P(t) = 0.85P(0). So

$P(t) = P(0)(0.97t)^{t}$

$0.85P(0) = P(0)(0.97t)^{t}$

$(0.97)^{t} = 0.85$

$\log{(0.97)^{t}} = \log{0.85}$

$t\log{0.97} = \log{0.85}$

$t = \frac{\log{0.85}}{\log{0.97}}$

$t = 5.34$

5.34 years for the sample to decay to 85% of its original amount

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3 years ago

The circumference of a circle is 19π in. What is the area, in square inches? Express your answer in terms of π.

Lelu [443]

Answer:

A = 90.25 pi in^2

Step-by-step explanation:

The circumference is given by

C = 2*pi*r

19pi = 2*pi*r

Divide each side by 2 pi

19pi / 2 pi = 2*pi*r/ 2pi

9.5 = r

The area is given by

A = pi r^2

A = pi ( 9.5)^2

A = 90.25 pi in^2

8 0

2 years ago

Read 2 more answers

Can you help me please

goldfiish [28.3K]

Answer:

mid point=(x1 + x2)/2 (y1 + y2)/2

(-5+5)/2 and (-7+4)/2

0 and 1.5

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2 years ago

Noah makes ceramic pots for the market. On the weekends he makes 11 more pots than he does during the week. Noah represented the

Shtirlitz [24]

For this case what you should do is use the given expression and add 14.
We have then:
Original function:
f (p) = p + 11.
New function:
g (p) = f (p) +14
Substituting we have:
g (p) = (p + 11) +14
g (p) = p + 25
Answer:
An expression that represents the total mumber of pots Noah made one weekend if he made 14 more than his usual number is:
g (p) = p + 25

7 0

2 years ago

Find the result of 765 times 95 divided by 5?please help me ​

Find the result of 765 times 95 divided by 5?please help me