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3 years ago

EXTRA POINTS PLEAS HELP ME !!!!!!!!!!!! :3 ◑ω◐ 14 points if you can help ◑ω◐

Mathematics

2 answers:

Ugo [173]3 years ago

5 0

Answer:

The answer is

(A. )1\50 - -(1 3/4) C. 0.50 + 1.75

Step-by-step explanation:

I had the same question 5 minutes ago hope this helps

VikaD [51]3 years ago

3 0

A is . 1/50
lmk if you need any other help :)

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a meal cost $15. we gave the waiter $18 and told him that the difference was his tip. what percent of the cost of the meal was t

Stella [2.4K]

18 - 15 = 3
3/15 = n/100
15n = 300
n = 20

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2 years ago

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What is the y-intercept of the graph below? HELP SOMEONE!!

Trava [24]

Answer:

the y-intercept is (0,75)

Step-by-step explanation:

the y-intercept is where the line crosses the y-axis.

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2 years ago

-17+4a<br><br> Please solve.

ikadub [295]

Answer:

-17+4a=0

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2 years ago

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A certain college graduate borrows 7864 dollars to buy a car. The lender charges interest at an annual rate of 13%. Assuming tha

White raven [17]

Answer:

Therefore rate of payment = $ 3145.72

Therefore the rate of interest = =$1573.17

Step-by-step explanation:

Consider A represent the balance at time t.

A(0)=$ 7864.

r=13 % =0.13

Rate payment = $k

The balance rate increases by interest (product of interest rate and current balance) and payment rate.

$\frac{dB}{dt} = rB-k$

$\Rightarrow \frac{dB}{dt} - rB=-k$ .......(1)

To solve the equation ,we have to find out the integrating factor.

Here p(t)= the coefficient of B =-r

The integrating factor $=e^{\int p(t) dt$

$=e^{\int (-r)dt$

$=e^{-rt}$

Multiplying the integrating factor the both sides of equation (1)

$e^{-rt}\frac{dB}{dt} -e^{-rt}rB=-ke^{-rt}$

$\Rightarrow e^{-rt}dB - e^{-rt}rBdt=-ke^{-rt}dt$

Integrating both sides

$\Rightarrow \int e^{-rt}dB -\int e^{-rt}rBdt=\int-ke^{-rt}dt$

$\Rightarrow e^{-rt}B=\frac{-ke^{-rt}}{-r} +C$ [ where C arbitrary constant]

$\Rightarrow B(t)=\frac{k}{r} +Ce^{rt}$

Initial condition B=7864 when t =0

$\therefore 7864= \frac{k}{r} - Ce^0$

$\Rightarrow C= \frac{k}{r} -7864$

Then the general solution is

$B(t)=\frac{k}{r}-( \frac{k}{r}-7864)e^{rt}$

To determine the payment rate, we have to put the value of B(3), r and t in the general solution.

Here B(3)=0, r=0.13 and t=3

$B(3)=0=\frac{k}{0.13}-( \frac{k}{0.13}-7864)e^{0.13\times 3}$

$\Rightarrow- 0.48\frac{k}{0.13} +11614.98=0$

⇒k≈3145.72

Therefore rate of payment = $ 3145.72

Therefore the rate of interest = ${(3145.72×3)-7864}

=$1573.17

4 0

3 years ago

What is the surface area of the cylinder? Express the answer in terms of pi

Sholpan [36]

Bonjour,

answer ≈ 522.92

working
A= 2πrh+2πr^2
=2 x π x 4 x 18+2 x π x 4^2
≈552.92031

4 0

3 years ago