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kondaur [170]
3 years ago
11

Carroll borrowed $500 at 14% interest for 6 months. How much interest did she pay?

Mathematics
1 answer:
pshichka [43]3 years ago
8 0
I think the answer is c
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Can anyone help me with this question please I really need help please I’ll mark as brainliest
tia_tia [17]

Answer:

f(x)=-11\times(7^x^-^1)

Step-by-step explanation:

Stare at the numbers. Especially the first two. First one is -11. Second is -11\times 7. Let's guess you keep multiplying. -77\times 7=-539. Smells correct, let's confirm with the last one: -539\times7 = -3773. I think we found a pattern. Each element is 7 times the previous one. With some practice you can just write the function, else let's divide by -11 away and let's see what we get:

f(1) = 1=7^0; f(2)=7; f(3)=7^2; f(4)=7^3. Basically, the exponent is 1 less than the value we're evaluating the function. That leads tho the following

f(x)=-11\times(7^x^-^1)

4 0
2 years ago
In 1980, the average cost of a pack of cigarettes was $0.88. In 2000, the average cost was $5.31 per pack.
yan [13]

Answer:

The average rate of change of the cost of a pack is 22 cents per year.

Another name for the average <em>rate of change</em> is <em>slope</em>.

Step-by-step explanation:

The average rate of change of the cost of a pack (r), in monetary units per year, is equal to the change in the average cost of a pack (\Delta c), in monetary units, divided by the change in time (\Delta t), in years. Then, the average rate of change is:

r = \frac{\$\,5.31-\$\,0.88}{2000-1980}

r = \$\,0.22\,\frac{1}{yr}

The average rate of change of the cost of a pack is 22 cents per year.

Another name for the average <em>rate of change</em> is <em>slope</em>.

8 0
3 years ago
Please help me because I need it
Juli2301 [7.4K]

to answer the surface area for a cylinder you need to do 2 times 3.14 (pi) times the radius times the height. once you have that answer you need to do 2 times pi times the radius squared. then after you get both of those answers you add them together

8 0
3 years ago
Read 2 more answers
Twelve people are given two identical speakers, which they are asked to listen to for differences, if any. Suppose that these pe
Karolina [17]

Answer:

Probability, P(X=3)=0.05371

Step-by-step explanation:

The experiment consists of 12 Bernoulli trials,n=12

Where sucess is defined with difference between the speakers and failure is defined with no difference between the speakers

Since people are guessing,the Probability P of sucess= 1/2

Therefore P(X=3) = b(3; 12, 0.5) = (12/3) (0.5)^3× (0.5)^9

P( X=3) = 0.0537

7 0
3 years ago
What is the perimeter of the figure in the diagram (round to three decimal places if necessary)?
Y_Kistochka [10]
Perimeter (p) = length around a shape.
So any horizontal sides we can add based upon their length in x-values and any vertical sides we can add based upon their length in y-values. The diagonal sides we can find by the distance formula:
d =  \sqrt{( {(x2 - x1)}^{2}  +  {(y2 - y1)}^{2} }
So the bottom base goes from x=1 to x=8, then up 1, right 1, and up from y=3 to y=9, then left from x=9 to x=6, down from y=9 to y=6, left from x=6 to x=3.
So far that is: (8-1)+1+1+(9-3)+(9-6)+(9-6)+(6-3)
= 7+2+6+3+3+3 = 24
Now for the diagonal:
d =  \sqrt{( {(x2 - x1)}^{2}  +  {(y2 - y1)}^{2}) }  \\  =  \sqrt{( {(3- 1)}^{2}  +  {(6 - 2)}^{2} )}  \\  =  \sqrt{( {2}^{2}  +  {4}^{2} )}  =  \sqrt{(4 + 16)} \\  =  \sqrt{20} = 2 \sqrt{5}  = 4.47
P = 24 + 4.47 = 28.47
D) 28.472

4 0
3 years ago
Read 2 more answers
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