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3 years ago

Help need now please

Mathematics

2 answers:

Irina-Kira [14]3 years ago

8 0

95.0% and she missed 5.0%

Bingel [31]3 years ago

8 0

0.95 because when you subtract 100 with 5 you get 95 and sense 100 is 1.00 you are subtracting 1.00 with 0.05 and you get 0.95

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(05.06)A chocolate bar measures 40 mm wide, 80 mm long, and 5 and 1 over 2 mm high. Will’s Wrapping Company is making a wrapper

photoshop1234 [79]

Answer:

Will’s Wrapping Company needs 7,720 mm2 of paper to wrap the chocolate bar.

Step-by-step explanation:

we know that

The amount of paper needed to make the wrapper is equal to the surface area of the chocolate bar

The surface area of a rectangular prism (chocolate bar) is equal to

$SA=2B+PH$

where

B is the area of the base

P is the perimeter of the base

H is the height of he prism

In this problem we have

$L=80\ mm\\W=5\frac{1}{2}\ mm=5.5\ mm\\H=40\ mm$

Find the area of the base

$B=LW=(80)(5.5)=440\ mm^2$

Find the perimeter of the base

$P=2(L+W)=2(80+5.5)=171\ mm$

Find the surface area

$SA=2(440)+171(40)\\SA=7,720\ mm^2$

5 0

3 years ago

tìm giá trị nguyên thuộc đoạn [-2019,2019] của tham số m để đồ thị hàm số <img src="https://tex.z-dn.net/?f=%5Cfrac%7B%5Csqrt%7B

pshichka [43]

Answer:

what

Step-by-step explanation:

7 0

2 years ago

Help me please 2 minutes for class to start

aleksandr82 [10.1K]

From c=b-5

Independent variable is b, the number of cookies in the jar before your visit

Dependent variable is c, the number of cookies remaining in jar

Any questions please just ask. Thanks!

6 0

3 years ago

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

I need help with a geometry question

Natali [406]

Lines a and b are parallel, and lines c and d are parallel

7 0

3 years ago