3 years ago

Find the area of the circle given the diameter. Round to the

Mathematics

1 answer:

alina1380 [7]3 years ago

7 0

Area of circle : A= pi(r)^2
d = 14 : 2 = 7
=> A = pi(7)^2
=> A = 153.94
B is correct

You might be interested in

The sum of two numbers is 34. The difference of the two numbers is 14. Find the two numbers.

harkovskaia [24]

Answer:24 and 10

Step-by-step explanation:24-10=34 24-10=14

6 0

4 years ago

Read 2 more answers

Which point is located at (-1, 3)? A B C D

inna [77]

The answer is c because you can use your eyes

3 0

3 years ago

Read 2 more answers

Halla el divisor común maximo 24 у 36

aksik [14]

El máximo común divisor es 12

Por cierto, hablo inglés, así que estoy usando Google Translat. :)

4 0

3 years ago

What percent of a present amount of radioactive radium (226Ra) will remain after 1200 years? The half life of 226Ra is 1599 year

sp2606 [1]

Answer:

59.44%

Step-by-step explanation:

$M_{R} = \frac{M_{O} }{2^{n} }$

$n=\frac{t}{t\frac{1}{2} }$

Where $M_{R}$ = mass remaining

$M_{O}$ =original mass.

t= time

$t\frac{1}{2}$ =half life

$t\frac{1}{2}$ =1599, t= 1200, $M_{O}$ =226, $M_{R}$ =?

$n=\frac{1200}{1599}$

n= 0.750469

$M_{R} = \frac{226}{2^{ 0.750469} }$

$M_{R}$ =134.3367amu

percentage of mass remaining = $\frac{134.3367amu}{226amu}$ *100%

= 59.44%

8 0

3 years ago

calculate the following showing populations the temperature in Johannesburg was 15° it drastically decreased by 17 °c what is th

rusak2 [61]

Answer:

-2 degrees Celsius.

Step-by-step explanation:

15 - 17 = -2

8 0

3 years ago

Read 2 more answers