All categories

2 years ago

HELP HELP HELP HELP

Mathematics

1 answer:

shutvik [7]2 years ago

8 0

Answer:

it is D

Step-by-step explanation:

You might be interested in

Why are 4/10 and 4/100 not equal?

Mrrafil [7]

The same reason 4 dimes and 4 pennies aren't equal.

To put it into decimal terms, 4/10 is 0.40 (or forty cents), whereas 4/100 is 0.04 (or four cents)

6 0

3 years ago

james invested some money at 13% interest. James also invested $199 more than 3 times that amount at 12%. How much is invested a

Komok [63]

9514 1404 393

Answer:

$3138 at 13%
9613 at 12%

Step-by-step explanation:

Let x represent the amount invested at 13%. Then (3x+199) is the amount invested at 12%. The total interest earned in 1 year is ...

(13%)(x) +(12%)(3x+199) = 1561.50

0.49x +23.88 = 1561.50 . . . . simplify

0.49x = 1537.62 . . . . . . . . . . subtract 23.88

x = 3138 . . . . . . . . . . . . . . . . divide by 0.49

3x+199 = 9613

$3138 was invested at 13%; $9613 was invested at 12%.

8 0

2 years ago

If 2000 dollars is invested in a bank account at an interest rate of 6 percent per year, find the amount in the bank after 7 yea

AfilCa [17]

Answer:

$3007.26

Step-by-step explanation:

Step one:

given data

Principal= $2000

rate= 6%= 0.06

time= 7years

Required:

The final amount A

Step two:

the expression for the compound interest is

$A= P(1+r)^t$

substituting we have

$A= 2000(1+0.06)^7\\\\A= 2000(1.06)^7\\\\A=2000*1.50363\\\\A=3007.26$

6 0

2 years ago

A spherical balloon is inflating with helium at a rate of 64 pi StartFraction ft cubed Over min EndFraction . How fast is the b

olga2289 [7]

Answer:

The radius of the balloon is increasing at a rate of 4 feet per minute.

Step-by-step explanation:

We are given the following in the question:

$\dfrac{dV}{dt} = 64\pi \dfrac{\text{ ft}^3}{\text{min}}$

Volume of sphere is given by

$V = \dfrac{4}{3}\pi r^3$

where r is the radius of the balloon.

Instant radius, r = 2 ft

Rate of change of volume =

$\dfrac{dV}{dt} = \dfrac{d}{dt}(\dfrac{4}{3}\pi r^3)\\\\\dfrac{dV}{dt} =4\pi r^2\dfrac{dr}{dt}$

Putting values, we get,

$64\pi = 4\pi (2)^2\dfrac{dr}{dt}\\\\\Rightarrow \dfrac{dr}{dt} = 4$

Thus, the radius of the balloon is increasing at a rate of 4 feet per minute.

5 0

3 years ago

Along with this one please

Anarel [89]

X=5.2
Hope this was helpful

8 0

2 years ago