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3 years ago

What is the surface area of a fear with a diameter of 2.7 inches? Use 3.14 for π

Mathematics

1 answer:

GrogVix [38]3 years ago

5 0

Answer:

22.8906 sq in

Step-by-step explanation:

SA of a sphere = 4 π $r^{2}$

r = 2.7 / 2 = 1.35

4 x 3.14 x $1.35^{2}$ = 22.8906

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A letter L with a height of 9 inches is drawn on the actual flag. What should be the height and inches of a letter L in the scal

NISA [10]

Answer:

0.5 inch on the drawing

Step-by-step explanation:

The following information is missing:

<em>The scale factor of the drawing to the actual flag is represented by the ratio 1:18. </em>

This scale factor means that 1 inch on the drawing are equivalent to 18 inches o n the actual flag. We want to know the height on the drawing, given that a height of 9 inches is drawn on the actual flag. The following proportion must be satisfied:

1 inch on the drawing / x inch on the drawing = 18 inches o n the actual flag / 9 inches o n the actual flag

x = 9/18 = 0.5 inch on the drawing

6 0

3 years ago

Solution to the system<br> y=-x2-3x+2<br> y=x+6

worty [1.4K]

Answer:

$x=-2,y=4$

Step-by-step explanation:

$y=-x^2-3x+2$

$y=x+6$

$x+6=-x^2-3x+2$

$x^2+x+6=-3x+2$

$x^2+4x+6=2$

$x^2+4x+4=0$

$(x+2)(x+2)=0$

$x=-2$

$y=(-2)+6=4$

8 0

2 years ago

How to solve it？pls help

USPshnik [31]

Answer:

I believe the answer is as follows:

Step-by-step explanation:

Interior angles: p, q, r

Exterior angles: t, s, v, u

5 0

3 years ago

The price of an item yesterday was $60. today, the price rose to $129. Find the percentage increase

rjkz [21]

Answer:

115% increase.

Step-by-step explanation:

129 - 60 = 69 / 60 = 1.15

1.15 x 100 = 115

8 0

3 years ago

Anna is making a banner out of 4 congruent triangles as shown below. How much blue trim will she need for each side

Ede4ka [16]

Answer:

The length of each blue trim is 17.2 inches

Step-by-step explanation:

Given

See attachment for banner

Required

The length of each blue trim

Since all 4 triangles are equal, then the dimension of 1 triangle is:

$Side\ 1 = 10$

$Side\ 2 = 14$

The hypotenuse (x) of the triangle blue trim is represented by the blue trim

So:

$x^2 = Side\ 1^2 + Side\ 2^2$

This gives

$x^2 = 10^2 + 14^2$

$x^2 = 100 + 196$

$x^2 = 296$

Take square root

$x = \sqrt{296$

$x = 17.2in$

3 0

3 years ago