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3 years ago

Plz help ill give u brainlist

Mathematics

1 answer:

Strike441 [17]3 years ago

7 0

Volume of a pyramid: 1/3(length x width x height)

Since it is a square pyramid, the base is a square, which means that the length and width of the base is 7 cm (the same).

Plug the numbers into the formula.

1/3(7 x 7 x 12) = 196

The volume is 196 cm³.

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You entered a contest through your local television station. There is one first prize of a new car! There are 5 second place pri

Grace [21]

Answer:

$\frac{1}{400}$ or 0.0025 0r 0.25%

Step-by-step explanation:

There are three categories that will get a prize

1) First place = 1 person

2) Second place = 5 persons

3) Third place = 20 persons

A total of 26 people will get prizes.

However, we want to determine your chance to win one of the second place prizes

There are 5 prizes in second place

This means out of a total of 2000 people, you could be among the 5

i.e 5 out of 2000

This is $\frac{5}{2000} = \frac{1}{400} = 0.0025$

This means you have a chance of 1 out of 400

= 0.25%

8 0

3 years ago

Read 2 more answers

Which unit of measure would be appropriate for the area of a soccer field that is 105 m long and 67 m wide

liq [111]

An appropriate unit of measurement for the area of the a soccer field is meters. It could never be miles, because that's way too long. Or millimeters, because that's way too short. Soccer fields are usually meters and meters long, so a unit of measure that is appropriate for an area of a soccer field is meters.

6 0

3 years ago

A grocer sells milk chocolate at $2.50 per pound, dark chocolate at $4.30 per pound, and dark chocolate with almonds at $5.50 pe

rosijanka [135]

Answer:

10 pounds of milk chocolate, 15 pounds of dark chocolate, and 10 + 15 = 25 pounds of almond chocolate

Step-by-step explanation:

Let x be the number of pounds of milk chocolate that he needs to use in the mixture. And y is the number of pounds of of dark chocolate. Since the mixture must use almonds chocolate as much as the other 2 combined in term of weight, and the total weight is 50 pounds. That means

milk_choco_weight + dark_choco_weight + almond_choco_weight = 50

x + y + (x + y) = 50

2(x+y) = 50

x+y = 25 or x = 25 - y

Since we know the price of the mixture, we can use the following equation

2.5milk_choco_weight + 4.3dark_choco_weight + 5.5almond_choco_weight = 4.54total_weight

2.5x + 4.3y + 5.5(x+y) = 50*4.54

2.5x + 4.3y + 5.5*25 = 227

2.5x + 4.3y = 227 - 137.5 = 89.5

We can substitute x = 25 - y

2.5(25 - y) + 4.3y = 89.5

62.5 - 2.5y + 4.3y = 89.5

1.8y = 27

y = 15

so x = 25 - y = 25 - 15 = 10

So we need 10 pounds of milk chocolate, 15 pounds of dark chocolate, and 10 + 15 = 25 pounds of almond chocolate

3 0

2 years ago

The US Census Bureau reported the US population to be approximately 308,000,000 in 2010. It also reported that 6.5% of the popul

Ivahew [28]

Given that the US population is approximately 308,000,000 in 2010 and that 6.5% of this population is under 5 years of age, we will know that number of children by multiplying 6.5% by 308,000,000. So the answer would be 20,020,000. So that is the number of children below 5 years old. Hope this helps.

3 0

2 years ago

What is the surface area of this design?<br> A.150in2<br> B.197in2<br> C.210in2<br> D.127in2

ANEK [815]

Answer:

197 in ^2 (answer B of the list)

Step-by-step explanation:

Notice that this figure has a total of 6 faces, four of which are rectangles (whose area is calculated as "base times height") and two trapezoids (whose area is (B+b)H/2 ).

The total surface area is therefore the addition of these six areas:

Rectangles:

5 in x 5 in = 25 in^2

5 in x 6.4 in = 32 in^2

9 in x 5 in = 45 in^2

Trapezoids:

Two of equal dimensions: B = 9 in, b = 5 in, H = 5 in

2 * (9 in + 5 in) 5 in /2 = 70 in^2

Which gives a total of (25 + 25 + 32+45 + 70) in^2 = 197 in^2

This agrees with answer B of he provided list.

6 0

3 years ago

Read 2 more answers