How do you calculate interest?

Answers

Answer 1

Answer: Well let’s say you put $100 in the bank. And they charge 10% interest. And 10% of $100 is 10. So it would be $10 interest.

Answer 2

Answer: use the simple interest calculator to find A, the final investment value, using the simple interest formula. A=P(1+rt) where P is the principal amount of money to be invested at an interest rate r% per period for t number of time periods. Where R is in decimal form; R=R/100; r and t are in the same units of time.

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You want to put $4,000 in a simple interest account. It has a 2.5% annual interest rate. How long will it take you to earn $500 in interest?

Answers

t=I/Pr
t=500/(4000*0.025)
t=5 yrs

One thumbtack weighs 0.25 ounce. How many thumbtacks are in a box that has a mass of 3500 grams? (Hint: 1oz ~28g

Answers

Alright so .25 oz is 1/4 of 1oz. Therefore you take 28 and divide it by 4 and get 7.

Then take 3500 and divide it by 7 which makes 500 thumb tacks.

I think idk though.

Final answer:

To find out how many thumbtacks are in the box, first convert the total mass of the box from grams to ounces using a conversion factor. Then, divide the total weight of the box in ounces by the weight of one thumbtack.

Explanation:

To answer the question about the number of thumbtacks in a box totaling 3500g in mass, we first need to convert the total mass of the box to the same units as the mass per thumbtack, in this case, ounces.

From the relationship, we know that 1 oz = 28.349 g. We can convert the mass of the box into ounces by multiplying the grams by the unit conversion factor. So the weight of the box in ounces is 3500 g * (1 oz / 28.349 g).

To find the number of thumbtacks in the box, then divide the total weight of the box in ounces by the weight of one thumbtack in ounces (0.25 oz).

Learn more about unit conversion here:

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ALGEBRA! NEED HELP!~A glass prism on a chandelier is 75 millimeters long. A base of the prism is an equilateral triangle with side lengtsh of 9 millimeters and a height of about 7.8 millimeters. What is the approximate surface area of the prism?

Answers

To find out a glass prism's surface are you should first find the, base's are. Since the base is triangle, it's are formula is : $A\quad =\quad \frac { h.b }{ 2 }$ (which h is height and b is base length). $A\quad =\quad \frac { 7,8.9 }{ 2 } \n A=\quad \frac { 70,2 }{ 2 } \n A=\quad 35,1$ since there are two triangle's their total area will be 70.2 To find the remaining surface's are multiply the perimeter of the base with the length. $perimeter\quad =\quad 9\cdot 3=27\n 27\cdot 75=2025$ then sum the total surface : 70,2 + 2025 = 2095,2

What is the surface area of the prism? A. 1296 in2
B. 1116 in2
C. 1080 in2
D. 1188 in2

Answers

ok so we have 3 rectangles and 2 triangles
area of rectangle=legnth times width
area of traingle=1/2 times base times height

24 times 20+15 times 20+15 times 20+1/2 times 9 times 24+1/2 times 9 times 24=1296
answer is A

What is the volume of the prism? Solid Figures, Part 1 A. 288 ft3 B. 432 ft3 C. 144 ft3 D. 24 ft3

Answers

the answer is b i believe

Your answer is B. 432 ft.

Hope this helps.

Latricia's vacation is in 4 weeks. There are 7 days in a week. How many days is until Latricia's vacation?

Answers

7 days in a week
4 weeks
So you do 7 days x 4 weeks and get 28 days

She will have to wait 28 days until her vacation
Hope I helped :)

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A submarine is diving to a total depth of 45 feet. It descends 15% of the total depth in 1 minute. How deep will the submarine be after 4 minutes?