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cluponka [151]
3 years ago
12

Suppose the diameter of a circle is 4 units. What is its circumference?

Mathematics
2 answers:
Alinara [238K]3 years ago
8 0

Answer:

pi4

Step-by-step explanation: Formula is piD, diamter is 4, so pi4 which equals 12.56

maxonik [38]3 years ago
3 0

Answer: 12.56 units

Step-by-step explanation:

I had this on khan academy

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PLEASE HELP! I will mark as brainliest if you help me. Solve for x. −ax + 2b > 8
anyanavicka [17]

Answer:

x < ( 8 - 2b ) / -a

Step-by-step explanation:

For this problem, we simply will solve the inequality for x.

-ax + 2b > 8

-ax > 8 - 2b

x < ( 8 - 2b ) / -a

Note, the comparison is flipped since a negative multiplicand was used to isolate x.

Cheers.

4 0
3 years ago
The graph of an exponential function is given. Which of the following is the correct equation of the function?
Effectus [21]
The answer is choice D

-----------------------------------------

Explanation:

We can rule out choice B and choice C which are y = 2.4^x and y = 3.5^x respectively. Why can we eliminate these? Because they are growth functions (the bases are larger than 1). The graph shown is a decay function. It goes downhill as you read it from left to right.

The answer is either choice A or choice D

If we plug in x = -2 into the equations for A and D, we get
y = 0.65^x = 0.65^(-2) = 2.36686
y = 0.32^x = 0.32^(-2) = 9.765625

The result for choice D is much closer to what the graph is showing. The graph appears to have the point (-2,11) on the curve. So that's why choice D is the best answer. 

Note: the graph is a bit small and its not entirely clear which points are on this graph other than (0,1). So this is a bit of educated guesswork. 

7 0
3 years ago
Solve the right triangle ABC with right angle C if B=30 degrees and c=10.
kenny6666 [7]
C=10, C=90°, B=30°, A+B+C=180°
A+30°+90°=180°⇒A=60°

cos30°=a/c
cos30°=a/10⇒a=cos30°*10
a<span>≃8.6602


c²=a²+b²⇒b²=c²-a²
b²=10²-8.6602²⇒b²=25
b=5
</span>
3 0
3 years ago
Read 2 more answers
Please help would be appreciated
yKpoI14uk [10]

Answer:

The total volume of the whole figure is 576m³.

Step-by-step explanation:

First find the volume for the first figure.

Volume of a Rectangular Prism (formula): L•W•H

V = (15m)(12m)(2m)

V = 360m³

Now, find the volume for the second figure.

V = (6m)(12m)(3m)

V = 216m³

Finally, just add both volumes to find the total volume of the entire figure.

Vt = 216m³ + 360m³

Vt = 576m³

5 0
2 years ago
Suppose your friend's parents invest $15,000 in an account paying 7% compounded annually. What will the balance be after 6 years
kykrilka [37]

Answer:

$22,510.96

Step-by-step explanation:

Final investment value

$22,510.96

Total interest earned

$7,510.96

Initial balance

$15,000.00

Total monthly deposits

$0.00

Effective Annual Rate (APY)

7%  

6 0
3 years ago
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