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Softa [21]
2 years ago
6

I don’t understand what to do

Mathematics
2 answers:
ICE Princess25 [194]2 years ago
8 0

Answer:

14 cm

r=7

d=2r

d=2×7

d=14

Step-by-step explanation:

please mark me as brainlest

Natasha2012 [34]2 years ago
3 0

Answer:  14cm

Step-by-step explanation:

The diameter of a circle is twice the radius.

Therefore, the diameter = 2*7 cm = 14cm

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A class has 12 boys and 18 girls. the class as a whole has a gpa (grade point average) of 2.88, and the boys have a gpa of 2.52.
MrRissso [65]
<span>3.12 First, write an equation to express what you know. g = number of girls b = number of boys b * 2.52 + g * x = 2.88(b+g) Solve for x, first substitute known values for g and b 12 * 2.52 + 18 * x = 2.88(12+18) Add and multiply what you already know 30.24 + 18x = 86.4 Subtract 30.24 from both sides 18x = 56.16 Divide both sides by 18 x = 3.12 Therefore the GPA of the girls is 3.12</span>
4 0
4 years ago
What is ten thousand more than 300,000 +99,000+5,000+40 is
vitfil [10]
The answer is 414,040. After you add
7 0
3 years ago
Do modern scientists believe that protons and nuetrons are not made of smaller particles
anyanavicka [17]

Answer: Thus, protons and neutrons are no more indivisible than atoms are; indeed, they contain still smaller particles, which are called quarks. Quarks are as small as or smaller than physicists can measure.

Step-by-step explanation:

4 0
3 years ago
An angle measures 16.6° less than the measure of its supplementary angle. What is the measure of each angle?
Serggg [28]
Supplementary angle: x + y = 180

180 - 16.6 = 163.4

The first angle would be 163.4 and the second angle would have to be 16.6

Hope this helped :)
6 0
2 years ago
A community had a population of 12,000 in 1985, which is increased to 20,000 in 2010. The saturation population is 80,000. Estim
ivann1987 [24]

Answer:

The right answer is :

(a) 23,200

(b) 24,514

(c) 22,926

Step-by-step explanation:

According to the question,

P_1 = 12000

P_2 = 20000

P_{sat}=80000

(a)

We know that the arithmetic growth formula will be:

⇒ P=Pi+K\times t...(1)

here,

⇒ K=\frac{P_2-P_1}{\Delta t}

        =\frac{20000-12000}{25}

        =\frac{80000}{25}

        =320

On putting the values in equation (1), we get

⇒ P_{2020}=20000+320\times 10

             =23,200

(b)

The geometric growth formula will be:

⇒ P=ln(Pi)+K\times t

here,

⇒ K=\frac{lnP_2-lnP_1}{\Delta t}

         =\frac{ln(20000)-ln(12000)}{25}

By putting the values of general log, we get

hence,

⇒ P_f=ln(20000)+0.0204\times 10

         =10.107

P_{2020}=e^{10.107}

          =24,514

(c)

⇒ P_f=P_{sat}-(P_{sat}-P_i)e^{-K\times t}

or,

⇒ K=-\frac{1}{\Delta t}ln(\frac{P_{sat}-P_2}{P_{sat}-P_1} )

from here, we get

        =0.005

hence,

⇒ P_{2020}=80000-(80000-20000)e^{-0.005\times 10}

             =80000-(60000)e^{-0.005\times 10}

             =22,926

5 0
3 years ago
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