Using the graph, estimate the cost of 100 kilowatts-hours of electricity

Find the surface area of the composite figur

By definition of surface area and the area formulae for squares and rectangles, the surface area of the composite figure is equal to 166 square centimeters.

<h3>What is the surface area of a composite figure formed by two right prisms?</h3>

According to the image, we have a composite figure formed by two right prisms. The surface area of this figure is the sum of the areas of its faces, represented by squares and rectangles:

A = 2 · (4 cm) · (5 cm) + 2 · (2 cm) · (4 cm) + (2 cm) · (5 cm) + (3 cm) · (5 cm) + (5 cm)² + 4 · (3 cm) · (5 cm)

A = 166 cm²

By definition of surface area and the area formulae for squares and rectangles, the surface area of the composite figure is equal to 166 square centimeters.

To learn more on surface areas: brainly.com/question/2835293

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3 0

2 years ago

There are 5 red and 3 black balls in a bag. Find the probability of drawing a black ball.

iren [92.7K]

Answer:

5 : 3 (8 total)

3/8 or 0.375 or 37.5%

5 0

3 years ago

Read 2 more answers

Find the sum of 5x-y and (2xy+xy)

devlian [24]

Since neither 5x nor -y has a "like term" in 2xy+xy, the sum of these quantities is simply

2xy+xy + 5x - y = 3xy + 5x - y

You might want to write this as y(3x -1) + 5x.

8 0

3 years ago

The earned run average (ERA) a of a baseball pitcher varies directly as the number of earned runs r and inversely as the number

7nadin3 [17]

Answer:

The number of earned runs is 28.

Step-by-step explanation:

Earned runs average:

The earned runs average of a pitcher is the number of runs the he/she gives each 9 innings on average.

Find the number of earned runs when the pitcher has an ERA of 2.25 after pitching 112 innings in the next season.

Solved by proportions, using a rule of three.

For each 9 innits, the pitcher gives 2.25 runs. How many runs for 112 innings?

9 innings - 2.25 runs

112 innings - x runs

Applying cross multiplication:

$9x = 2.25*112$

$x = \frac{2.25*112}{9}$

$x = 28$

The number of earned runs is 28.

6 0

3 years ago

It is predicted that garden gnome value will go up by 2% each year, forming a geometric progression. Jean-Claude has a garden gn

yawa3891 [41]

Answer:

Step-by-step explanation:

a ) The worth of Jean-Claude's gnome after 1 year

= 80000 x 1.02

= £81600

b ) common ratio of geometric progression

= 81600 / 80000

= 1.02

c ) worth after 10 years

= 80000 x 1.02¹⁰

= 80000 x 1.21899

= £97519.55

d )

120000 = 80000 x $1.02^k$

1.5 = $1.02^k$

ln1.5 = k ln 1.02

k = ln 1.5 / ln 1.02

= .4054 / .0198

= 20.47 years .

8 0

4 years ago