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OleMash [197]
3 years ago
6

How do you do this?

Mathematics
2 answers:
lora16 [44]3 years ago
6 0
X/5 = 24/8
  (because the triangles are similar)

x/5 = 3

x = 5*3 = 15 Answer

a/27 = 8/24 = 1/3 
a =  9  Answer
astraxan [27]3 years ago
3 0
3)a/8 = 27/24 => a = 8*27/24 = 9

x/24 = 5/8 => x = 24*5/8 = 15

4)C≡X, A≡Z, B≡Y

5)C=2πR=15π=>R=7,5

A = πR² = 56,25π cm²
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Solving Exponential Equations (lacking a common base)<br> (0.66)^k=9
Alexandra [31]

Answer:

k = log9 / log 0.66

k = 5.3

Step-by-step explanation:

Please always remember that, when an exponential equation is given with different bases, the best approach is to take log of both sides.

If you have a calculator handy, that would be pretty fast and easy.

0.66 ^ k = 9

Take log of both sides:

klog 0.66 = log 9

k = log 9 / log 0.66

k = 0.954 / - 0.18

k = -5.3

Maths is fun, let's keep learning

3 0
2 years ago
Mike was in charge of a special sports day at the Community Center. A company donated 50 boxes of ice cream bars, with 12 bars i
Anna007 [38]

The right answer is Option D.

Step-by-step explanation:

Boxes of ice cream received = 50

Ice-creams in each box = 12

Total ice-cream bars = No. of boxes * Ice cream bars in each box

Total ice-cream bars = 12*50=600

No. of people who had ice cream bars = 520

Ice-cream bars left = Total ice cream bars - No. of people who had ice cream

Ice cream bars left = 600-520=80

80 ice cream bars were left.

The right answer is Option D.

Keywords: multiplication, subtraction

Learn more about subtraction at:

  • brainly.com/question/12896802
  • brainly.com/question/13063819

#LearnwithBrainly

8 0
3 years ago
A professor at a university wants to estimate the average number of hours of sleep the students get during exam week. The profes
balandron [24]

Answer:

The sample size is n = 2

Step-by-step explanation:

From the question we are told that

   The margin of error is  E =4.266

    The standard deviation is  \sigma = 2.539

From the question we are told the confidence level is  99% , hence the level of significance is    

      \alpha = (100 - 99 ) \%

=>   \alpha = 0.01

Generally from the normal distribution table the critical value  of  \frac{\alpha }{2} is  

   Z_{\frac{\alpha }{2} } =  2.58

Generally the sample size is mathematically represented as  

   n = [\frac{Z_{\frac{\alpha }{2} } *  \sigma }{E} ] ^2

=>  n = [\frac{2.58  *  2.539  }{4.266} ] ^2

=>  n = 2

6 0
2 years ago
Find the area of figure 1.<br><br> a -12 units2<br> b- 14 units2<br> c- 8 units2<br> d- 10 units2
Brilliant_brown [7]

Answer:

D

Step-by-step explanation:

if you look at the chart. it goes up five and has a width of 2. multiply 5 x 2 = you get 10

3 0
2 years ago
Read 2 more answers
Which decimal is equivalent to 25/6?
Marysya12 [62]

Answer:

4.166666667

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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