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nekit [7.7K]
2 years ago
15

(50 POINTS AND BRAINLIEST TO BEST)

Mathematics
1 answer:
Nana76 [90]2 years ago
6 0

a) Cube area = 6a^2

a = 6(5.25)^2

5.25 * 5.25 = 27.5625 * 6 = 165.375

Rounded, thats 165.38

b) Rectangular prism area = 2(wl + hl + hw)

Lets say l = 6.8, w = 8.2, h = 10

It equals about 441.52

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How much interest is earned on a principal of 646 invested at an interest rate of 5 for two years
IceJOKER [234]

Answer:

Step-by-step explanation:

P=646

R=5%

T=2yrs

I=?

I=PRT/100

I= 646*5*2/100

I= 64.6

5 0
2 years ago
Can some help and explain this please? ​
kifflom [539]

Answer:

a. 10^{3}    10^2

b. 10     10^2

Step-by-step explanation:

10^{2} = 100 ->  so 100*0.005= 5

if you still dont understand  search up "scientific notation"

5 0
2 years ago
Read 2 more answers
A bed is 2400 a discount of 25% was given on the
Brrunno [24]

Answer:

800

Step-by-step explanation:

Given: The selling price of bed is 2400.

          Discount offered is 25%

Lets assume the cost of bed be "x"

Discount offered on the cost price of bed= \frac{25}{100} \times x= 0.25x

∴ Discount offered on the cost price of bed= 0.25x

We know the selling price of bed after discount provided.

Finding the cost price of the bed.

⇒ x-0.25x= 2400

⇒ 0.75x= 2400

cross multiplying both side.

∴ x= \frac{2400}{0.75} = 3200

∴ Cost price of the bed is 3200.

We know selling price of the bed is 2400.

Now, finding the saving.

Saving on the price of bed= Cost price- selling price

Saving= 3200-2400= 800

Hence, saving on the purchase of the bed is 800.

7 0
3 years ago
Lots of points help me! its math 9th grade
77julia77 [94]
I think the answers would be B) 17
4 0
3 years ago
Read 2 more answers
A large brine tank containing a solution of salt and water is being diluted with fresh water.
kirza4 [7]

Answer:

41.04 g/L

Step-by-step explanation:

The relationship is modeled by the following function:

S(t) = 500*e^(-0.25*t)

where t is time elapsed after the dilution begins (in hours) and S(t) the concentration of  salt in the tank (in g/L)

Replacing with t = 10

S(t) = 500*e^(-0.25*10)

S(t) = 41.04 g/L

6 0
3 years ago
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