All categories

3 years ago

Please help me find the surface area of these both

Mathematics

1 answer:

klio [65]3 years ago

5 0

The formula to find surface area is SA= 2(L×W + L×H + H×W)

The 2 is there to double each side.

so..

SA = 2(L×W + L×H + H×W)

= 2( 16×9 + 16×4 + 4×9)

= 2( 144 + 64 + 36)

= 2( 244)

= 488 units2

B) SA = 2(L×W + L×H + H×W)

= 2 ( 13×9 + 13×4 + 4×9)

=2 ( 117 + 52 + 36)

=2 ( 205)

SA= 410cm2

You might be interested in

What is the value of the expression |a + b| + |c| when a = –3, b = 7, and c = 1

Damm [24]

The answer is 5 hope this helps

6 0

3 years ago

Read 2 more answers

I need help with this question please

umka21 [38]

Answer:

C. 9

Step-by-step explanation:

$area \: of \: square = {side}^{2} \\ \therefore \: {side}^{2} = 81 \\\therefore \: side = \sqrt{81} \\ \therefore \: side = 9 \: feet$

Hence, side length of square = 9 feet.

7 0

3 years ago

Read 2 more answers

1.15 + m = 10 Please give an answer

garik1379 [7]

Answer:

M = 8.85

Step-by-step explanation:

10 - 1.15 = 8.85

8 0

3 years ago

In ABC, the sum of the measures of Angle A and angle B is 47°. What is the measure of Angle C ?

puteri [66]

Answer:

∠ C = 133°

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180° , that is

∠ A + ∠ B + ∠ C = 180° ( substitute A + B = 47° )

47° + ∠ C = 180° ( subtract 47° from both sides )

∠ C = 133°

4 0

2 years ago

Read 2 more answers

What's the explicit rule for the sequence 3, -6, 12, -24, 48, ...?

777dan777 [17]

Answer:

$\sf \dfrac{-3}{2}(-2)^n$

Step-by-step explanation:

Explicit formulas are used to represent all the terms of the geometric sequence with a single formula.

$\sf \boxed{\bf t_n = ar^{n-1}}$

a is the first term.

r is the common ratio.

r = second term ÷ first term.

3 , - 6 , 12, - 24, 48 ,........

a = 3

r = -6 ÷ 3 = -2

$\sf t_n = 3*(-2)^{(n-1)}\\\\$

$\sf = 3*(-2)^{n}*(-2)^{-1}\\\\ =3*(-2)^n*\dfrac{-1}{2}\\\\= \dfrac{-3}{2}(-2)^n$

Check:

$\sf t_1 =\dfrac{-3}{2}*(-2)^1=\dfrac{-3}{2}*(-2) = 3\\\\\\t-2 = \dfrac{-3}{2}*(-2)^2 = \dfrac{-3}{2}*4=-6\\\\\\t_3=\dfrac{-3}{2}*(-2)^3=\dfrac{-3}{2}*(-8)=12$

4 0

2 years ago

Read 2 more answers