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2 years ago

Anyone can answer this ?

Mathematics

1 answer:

TEA [102]2 years ago

7 0

Answer:

NOT nets = A, C, D, F
Nets = B, E, G, H

Figure B (Triangular prism)

SA: 3 rectangles + 2 triangles

Rectangles: (20·8) + (20·10) + (20·6) = 480 ft²

Triangles: (8·6)/2 + (8·6)/2 = 48 ft²

Total SA: 528 ft²

Figure E (Square pyramid)

SA: 1 square + 4 triangles

Square: 10·10 = 100 yd²
Triangles: (12·10)/2 + (12·10)/2 + (12·10)/2 + (12·10)/2 = 240 yd²

Total SA: 340 yd²

Figure G (Rectangular prism)

SA = 2 wide rectangles + 4 narrow rectangles

Wide: (7·11) + (7·11) = 154 cm²

Narrow: (2·7) + (2·7) + (11·3) + (11·3) = 94 cm²

Total SA: 248 cm²

Figure H (Cube)

SA = 6 squares

Squares: 6 x (1·1) = 6 m²

Total SA: 6 m²

I hope this helps and God bless!

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100 students in a classroom like iPhone or Samsung or both of them. Out of them, 40 like both mobiles. If the ratio of the numbe

sleet_krkn [62]

Answer:

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Step-by-step explanation:

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4 years ago

Express "2 inches of snow in 9 hours" as a rate and a unit rate

evablogger [386]

It takes 4.5 hours for one inch of snow

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3 years ago

Halie is a perfectionist and wants each piece of her cake to be exactly the same area. if the diameter of her cake is 12 in and

Galina-37 [17]

To find this answer you need to find the area of the whole cake and divide it by 8. To find area of a circle, you need the formula (pi)*r^2. The radius is the diameter divided by two. Your final formula would be (pi)*8^2. This is approx. 201.06 in^2. Divide this number by 8, and you have your answer. I got 25.13 in^2.

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3 years ago

12-(4) - 1<br> 2<br><br> Please helppp!!! :)

Kryger [21]

Answer:

Step-by-step explanation:

Simplify:

$12\frac{1}{2} = \frac{25}{2}$

$-4\frac{1}{2} = \frac{-9}{2}$

$\frac{25}{2} - (\frac{-9}{2} ) = \frac{25}{2} + \frac{9}{2} = \frac{34}{2} = 17$

When you have a subtraction sign next to a negative number, the negative number will turn positive since it's understood as -1 multiplied by the number when it's a negative number.

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3 years ago

The polynomial -x^3-x^2+12x represents the volume of a rectangular aquatic tank in Cubic feet. The length of the tank is (x+4).

Sliva [168]

Answer:

A. x(x +4)(3 -x) . . . . a cubic will have 3 linear factors

B. The dimensions are x, x+4, 3 -x, or 1.694 ft, 5.694 ft, 1.306 ft

C. x = (√37 -1)/3 ≈ 1.694254 ft

D. Maximum volume: ≈ 12.597 ft³

Step-by-step explanation:

A. The first attachment shows the synthetic division of the given polynomial by x+4. The result is -x^2 +3x = x(3 -x). Hence the factored polynomial is ...

x(3-x)(x+4) . . . . . . shown as positive

Since the polynomial is a cubic, we know there will be 3 roots. For this problem, that means we expect 3 factors.

B. We are apparently to assume that the dimensions of the tank correspond to the three factors:

For the maximum size tank (see part C), the corresponding measurements in feet are

1.694 ft
1.306 ft
5.694 ft

C. Tank volume will be maximized when the derivative of volume with respect to x is zero. The derivative polynomial is ...

dV/dx = -3x^2 -2x +12

Solving this by the usual methods, we find the positive value of x to be ...

x = (-1 +√37)/3 ≈ 1.694254 . . . . feet

D. Evaluating the polynomial for this value of x gives ...

volume ≈ 12.5972 . . . cubic feet

6 0

3 years ago