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arsen [322]
4 years ago
13

Can anybody help me solve for surface area? (Formula=add all the areas of the faces)

Mathematics
1 answer:
TiliK225 [7]4 years ago
6 0

Answer:

230.3cm^2

Step-by-step explanation:

surface area: sum of all faces

base: 12 x 2.5 = 30cm^2

back: 84 cm ^2

cross section x 2 = 7 x 2.5 = 17.5

use Pythagoras theorem to find the width of slope: 7^2 + 2.5^2 = 49 + 6.25 = 55.25. square root of 55.25 = 7.4

so, area of slope : 7.4 x 12 = 88.8cm^2

sum of all areas: 114 + 106.3  = 230.3

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Which number is greater than 3.14159 x 10^7
nydimaria [60]

Answer:

anything greater than 31415900. 4000000000, 31415901, etc.

Step-by-step explanation:

3.14159*10^7 is 31415900. That means anything greater than that is a valid answer.

3 0
4 years ago
Ill give a tip
e-lub [12.9K]
Divide the APR by 360 days and multiply it by 30 days to get the monthly interest. Each loan is usually secured by the car you bought. So we will use the secured APR.

8. Average rating secured apr: 5.85% divide by 360 multiply by 30:  0.4875% monthly rate
Cost of car: 19,725 ; sales tax: 4.75% ; down payment: 2,175

19,725 x 1.0475 =  20,661.94 - 2,175 = 18,486.94 loan amount
18,486.94 x 0.4875% = 90.12 accrued interest for the 1st month.

9. Excellent rating secured apr: 4.80% divide by 360 multiply by 30: 0.40% monthly rate
Cost of car: 15,867 ; sales tax: 5.25% ; down payment: 10% of total cost

15,867 x 1.0525 =  16,700.02 x 90% = 15,030.02 the principal balance at the start of the loan.

10. Fair rating secured apr: 7% divide by 360 multiply by 30: 0.5833% monthly rate
Cost of new car: 19,072 ; sales tax: 4.5% ; down payment: 1,200
Cost of used car: 15,365; sales tax: 4.5% ; down payment: 1,200

19,072 x 1.045 = 19,930.24 - 1,200 = 18,730.24
18,730.24 x 0.5833% = 109.25 accrued interest

15,365 x 1.045 = 16,056.43 - 1,200 = 14,856.43
14,856.43 x 0.5833% = 86.66 accrued interest

109.25 - 86.66 = 22.59 is the difference in interest accrued by the end of the first month.
7 0
3 years ago
Write an equation of the line that passes through each pair of point y=mx+b
jarptica [38.1K]
y=-\frac{2}{3}x+4

Explanation

Step 1

find the slope

when yo know 2 points of a lines, P1 and P2, you can find the slope by using:

\begin{gathered} \text{slope}=\frac{change\text{ in y}}{\text{change in x}}=\frac{y_2-y_1}{x_2-x_1} \\ \text{where} \\ P1(x_1,y_1) \\ P2(x_2,y_2) \end{gathered}

then, let

P1(6,0)

P2(0,4)

replace

\begin{gathered} \text{slope}=\frac{y_2-y_1}{x_2-x_1} \\ slope=\frac{4-0}{0-6}=\frac{4}{-6}=-\frac{2}{3} \end{gathered}

Step 2

find the equation of the line,

\begin{gathered} y-y_1=slope(x-x_1) \\ \text{replace} \\ y-0=-\frac{2}{3}(x-6) \\ y=-\frac{2}{3}x+\frac{12}{3} \\ y=-\frac{2}{3}x+4 \end{gathered}

so , the equation of the lines is

y=-\frac{2}{3}x+4

where -2/3 is the slope, and 4 is the y-intercept

I hope this helps you

4 0
1 year ago
Given cos 0= -1/2 and angle 0 is in quadrant two what is the exact value of sin 0  in simplest form
Viktor [21]

Answer:

-\sqrt{7/4}

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
What is the reciprocal of 3 3/7?
hjlf
That is what I am doing in school too
5 0
3 years ago
Read 2 more answers
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