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2 years ago

In 2008, the price of gasoline was $2.79 per gallon. In 2009, the price of gasoline was

Mathematics

1 answer:

ikadub [295]2 years ago

7 0

Answer:

36%

Step-by-step explanation:

line up $ and % data like this:

$2.79 represents 100%

$3.79 represents X%

cross multiply

X*2.79 = 3.79*100

divide both sides by 2.79

X= 3.79*100 / 2.79 ≈ 136%

so it increased 36%

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Which is the least expensive unit rate:

Vaselesa [24]

Answer:

So 3 for $1.26 and 4 for $1.68

Step-by-step explanation:

3 for $1.26 means $0.42 per each

4 for $1.68 means $0.42 per each

5 for $2.25 means $0.45 per each

So 3 for $1.26 and 4 for $1.68 would be the least expensive unit rate!

Hope this help :3

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3 years ago

Exercise 12.1.1: Coin flips and events. About A coin is flipped four times. For each of the events described below, express the

butalik [34]

Answer:

a $Pr = 0.25$

b $Pr = 0.50$

c $Pr = 0.1875$

Step-by-step explanation:

Given

$n = 4$ --- number of times

$r = 2$ --- faces of a coin

First, is to determine the sample size.

This is calculated as:

$Size =r^n$

$Size =2^4$

$Size =16$

Solving (a): First and last slip is head

This event is represented as:

$E=\{HHHH, HHTH, HTHH, HTTH\}$

The probability is calculated as:

$Pr = \frac{n(E)}{Size}$

$Pr = \frac{4}{16}$

$Pr = 0.25$

b) At least 2 consecutive flips that is heads.

This event is represented as:

$E=\{HHHH,HHHT,HHTH,HHTT,THHH,THHT,HTHH,TTHH\}$

The probability is calculated as:

$Pr = \frac{n(E)}{Size}$

$Pr = \frac{8}{16}$

$Pr = 0.50$

c) First is tail and at least 2 consecutive flips is head.

This event is represented as:

$E=\{THHH,THHT,TTHH\}$

The probability is calculated as:

$Pr = \frac{n(E)}{Size}$

$Pr = \frac{3}{16}$

$Pr = 0.1875$

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2 years ago

A fishing supply store buys fishing rods for $11 and sells them at a markup of 220%. One day, they decide to put

allsm [11]

The answer is: $28.16

A markup of 220% would bring 11 to 35.20, and a mark down of 20% would bring 35.20 to 28.16.

Your'e Welcome (ФДФ) .

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2 years ago

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The surface area of a square pyramid is 136 square inches. The base length is 4 inches. What is the slant height?

aivan3 [116]

The surface area is 13630=1/2(4)(height)30=2(height)and from there we can solve. 30/2=15the height of the triangle is 15, which is also the slant heightto check our work, 1/2(4)(15)=304x15=601/2x60=30

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2 years ago

In a poll of the students in mrs. Rodriguez's class, six say they leave within six blocks of school. This amounted to 20% of the

Lostsunrise [7]

There are 30 students. (: Becuase since 6 students make up 20% of the class. you just multiply 5 by 6 and get 30.

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3 years ago

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