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ElenaW [278]
3 years ago
11

PLZ HELP AND EXPLAIN !! Arron borrowed $200 from his cousin. He promised to repay the loan in 2 years at a simple annual interes

t rate of 5%. How must Intrest will Arron owe at the end of 2 years
Mathematics
1 answer:
Dmitriy789 [7]3 years ago
5 0
The first thing you have to do is know the equation. The equation is a(1+p)^t.
a= the amount of money p= the percent represented as a decimal and t=time ( the t is raised as an exponent)
so, in this case, it is represented as 200(1+0.05)^2\
200(1.05)^2
200(1.1025)
220.5 That is how much extra he would owe in interest fee's

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What is the area of a circle whose radius is 4 cm?
MaRussiya [10]
Well first, we must remember the formula for the area of a circle.
The formula for the area of a circle is:
PiR^2, or Pi • R^2.
Basically this means 3.14 (Pi) • R • R (Radius).
We have our radius, 4, so we can plug in our numbers to solve.
3.14 • 4 • 4 is our formula, so let's solve.
4 • 4 = 16.
16 • 3.14 = 50.24.

Remember when we solve for the area, we use units squared (units^2).

Your answer is 50.24 cm^2.

I hope this helps!
6 0
3 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=3x%20%3D%203%20%7B%3F%7D%5E%7B2%7D%20" id="TexFormula1" title="3x = 3 {?}^{2} " alt="3x = 3 {?
Luba_88 [7]
Three x = Three x over 2 squared (x/2
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5 0
3 years ago
Please help me!!!! I would really appreciate it!!!
Tpy6a [65]

Answer:

x=-(7 \pm i\sqrt(7))

Step-by-step explanation:

3 0
1 year ago
How is twelve divided by fifteen equal to eight.
alexira [117]
It isn't at all!

When dividing numbers, the easiest way is to imagine the values as a fraction, and then reduce that fraction. If it reduces to a core fraction (ones that you should know their decimal value without thinking), then you have your answer.

\frac{12}{15} =  \frac{4}{5} = 0.8

We simplified our fraction by dividing the numerator and denominator by 4, which left us with  \frac{4}{5}, which we know is equal to 0.8.

You may be confused thinking that 0.8 is the same as 8. 0.8 is actually a tenth of the value of 8. This makes them very different values.

Below, I have also included a picture to help you memorize your common/core fractions. I recommend learning these as they will help you get through all sorts of math, from Geometry to Calculus!

 

8 0
3 years ago
PLEASE HELP!!!! I’m about to rip my hair out over this.
Nina [5.8K]

Step-by-step explanation:

1. The equation graph is a parabola, so the maximum height will be the vertex of the parabola. You can find the vertex coordinate t using the formula:

t = -b/2a

t = -18/2•(-4.9)

t = -18/-9.8

t = 1.84 seconds

2. The height of the ground is 0, so the balls hit the ground when the equation result is 0:

0 = -4.9t²+18t+10

Now you solve it using Bhaskara:

Δ = b² -4ac

Δ = 18² -4•(-4.9)•10

Δ = 520

t = (-b ±√Δ)/2a

t = (-18 ± √520)/2•(-4.9)

t1 = (-18 - 20.8)/-9.8

t1 = 3.96 seconds

t2 = (-18 +20.8)/-9.8

t2 = -0.28

Doesn't exist negative time, so we pick the first value found, t = 3.96 seconds

3. Now you just need to put 3 in place of t to find the result:

h = -4.9•3² +18•3 +10

h = -4.9•9 + 54 + 10

h = -44.1 + 64

h = 19.9 meters

4. You just need to put 1 in place of t to find the height:

h = -4.9•1²+12

h = -4.9+12

h = 7.1 meters

5 0
3 years ago
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