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Svetllana [295]
4 years ago
12

3. Quincy deposits $400 in a new bank account that earns 4% simple interest per year. What

Mathematics
1 answer:
Illusion [34]4 years ago
8 0

Answer:

$448

Step-by-step explanation:

We can use the simple interest formula for this:

A = P (1 + rt)

<em>P = initial balance</em>

<em>r = annual interest rate</em>

<em>t = time</em>

<em />

First, change 4% into its decimal form:

4% -> \frac{4}{100} -> 0.04

Now, lets plug in the values:

A=400(1+(0.04)(3))

A=448

The total amount in the account after 3 years will be $448

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I've been having trouble in my lessons and I need a bit of help. If someone could explain how to do the problem, or work with me
stiv31 [10]

Answer:

Sorry if this isnt helpful: Im just going off stuff i learned to see if this will help you at all. Im only in 7th so.. Sorry in advance!!

Step-by-step explanation:

To find the rate, you need to create a unit rate table thing, like this:

5/3 = ?/1 To do this, you would need to divide 5 by 3 and 3 by 3 to get y and x. You get: 1.666 continued. Rounded, about 1.7 . so your unit rate for part A is 1.7/1. You would do the same thing. 2/3 = ?/1. I will let you solve that :)))

Finished A! Now B:

To compare, we use the butterfly method! so 1.7/1 o ?1. cross multiply, and whichever number is bigger comes on top. Then you would explain why that number is bigger. BAM

6 0
3 years ago
A square and an equilateral triangle have equal perimeters. the area of the triangle is 
Ivenika [448]

a - length of side of a square

t - length of side of a triangle

The perimeter of a square: P_S=4a

The perimeter of a triangle: P_T=3t

We have the area of a triangle: A_T=16\sqrt3\ cm^2

The formula of an area of an equilateral trinagle: A_T=\dfrac{t^2\sqrt3}{4}

Substitute:

\dfrac{t^2\sqrt3}{4}=16\sqrt3    <em>multiply both sides by 4</em>

t^2\sqrt3=64\sqrt3     <em>divide both sides by \sqrt3</em>

t^2=64\to t=\sqrt{64}\to t=8\ cm

The perimeter of a triangle: P_T=3(8)=24\ cm

Substitute to the formula of a perimeter of a square:

4a=24       <em>divide both sides by 4</em>

a=6\ cm

The formula of a diagonal of a square: d=a\sqrt2

Substitute:

d=6\sqrt2\ cm

3 0
3 years ago
(4a - b)(2a - 3b) =<br><br>A 8a² + 3b²<br>B 8a² - 3b²<br>C 8a² - 10ab + 3b²<br>D 8a² - 14ab + 3b²
Alika [10]

Answer:

The answer is option D.

Step-by-step explanation:

(4a - b)(2a - 3b)

Expand the terms

We have

8a² - 12ab - 2ab + 3b²

Which is

8a² - 14ab + 3b²

That's option D.

Hope this helps you

3 0
3 years ago
A square pyramid is 6 feet on each side. The height of the pyramid is 4 feet. What is the total area of the pyramid?
Temka [501]
Answer is C, 96 ft squared.
4 0
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What expression can be used to add 7/10 + 13/20
lora16 [44]
0.7+0.65 I’m not sure this is what u were looking for but I hope it helps have a good one
4 0
3 years ago
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