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IrinaVladis [17]
3 years ago
6

consider a pyramid with a height 10 feet in a square base with side lengths 7 feet. How does the volume of the pyramid change if

the base stays the same and the height is doubled
Mathematics
1 answer:
MAVERICK [17]3 years ago
6 0
The volume of a pyramid is given by the formula

V= 1/3 x bxh
b= base, since the base is square, so b= L²=49 feet²
h=10feet
so finally  V= 1/3x 49x10= 163.33 ft^3

if the height is doubled it means  H=2h=20
so the volume is V= 1/3x 49x 20=326.33 ft^3


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Sveta_85 [38]

Answer:

0.24

Step-by-step explanation:

From the information given:

Let's have a schematic view of a tree diagram

                                                   A

                 P(Santa Cruz)                        P(Isabella)

                  = 13/15                                    = 2/15

P(Success | Santa Cruz) = 0.09              P(Success | Isabella) = x

We are told that many have tried to locate the giant turtle, but 89% of them have failed.

This means the probability of success is:

P(success) = 1 - 0.89 = 0.11

We need to find   P(Success | Isabella),

Suppose   P(Success | Isabella) be x as shown above,

Then:

P (Success) = P(Santa) P((Success | Santa Cruz) +   P(Isabella) P(Success | Isabella)

0.11 = \dfrac{13}{15}(0.09)+ \dfrac{2}{15}(x)

0.11 - \dfrac{13}{15}(0.09)= \dfrac{2}{15}(x)

0.032= 0.133(x)

make x the subject of the formula:

x =  0.032/0.133

x = 0.24

6 0
3 years ago
Rick deposited $1500 in a savings account that earns 6% interest for 4 years. How much money is in his account at the end of the
AlladinOne [14]

Answer:

$5820

Step-by-step explanation:

1500*6%=90 per month

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A 50-gallon tank is filled with a 40% ethanol solution. How much solution should be drained but and replaced with an 80% ethanol
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How do you create your equations when working on a mixture word problem?

Let's try to think about the general form of a word problem involving mixtures.

In general, we have the following scenario:

a merchant sells two kinds of products (coffee, sweets, etc).

we know the unit prices for both kinds of products and for the final mixture

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p

2

US dollars per pound for the second kind of product

p

m

US dollars per pound for the mixture

we know the total quantity formed by the mixture of the two products (

q

pounds)

we have to find out the quantities of each product needed to form the mixture

(here we have the variables:

x

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y

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Now, we have sufficient information to work out the equations.

First, we know that the sum of the two quantities is

q

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x

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p

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Now, we have a system of two linear equations that can be easily solved by substitution.

3 0
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A bag contains 31 checkers—13 red and 18 black. Determine whether the events "a red checker is selected, not replaced and then a
Ipatiy [6.2K]

Answer:

dependent, 39/155

Step-by-step explanation:

Since the checkers are not replaced, the events are dependent since the number of checkers in the bag  when you pick the second time depends on the first pick.

31 checkers—13 red and 18 black.

P(red) = red/ total

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Keep the checker

Then 30 checkers—12 red and 18 black.

P(black) = black/ total

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P ( red, keep,black) = 13/31 *3/5

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8 0
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What to the tenth power can get you 300
OLEGan [10]

Answer:

1.7689 (rounded to 4 decimal places)

Step-by-step explanation:

Let the number we are seeking be "x", thus we can write the equation as:

x^{10}=300

Since we have raised "x" to the "10th power", to get "x" back again, we need to take 10th root. Same goes for right side, we take 10th root of 300. We will get our answer. The process shown below:

x^{10}=300\\\sqrt[10]{x^{10}} =\sqrt[10]{300} \\x=\sqrt[10]{300} \\x=1.7689

hence, 1.7689 raised to 10th power will give us 300

5 0
3 years ago
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