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3 years ago

The sales tax in Ontario is 13%.

Mathematics

1 answer:

sweet [91]3 years ago

7 0

The cost of the fishing pole before sales tax is $29.

32.77 = 113%
113 / 100 = 1.13
32.77 / 1.13 = 29

Pre-tax = $29

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What is the percent of change from 5 cups to 8 cups

Maksim231197 [3]

8cups- 5cups= 3cups - change

5- 100%

3-p

cross multiply

5p=3x100

5p=300 divide both sides by 5

p=60

Answer: an increase of 60%

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3 years ago

What is the proportion?????

Alenkasestr [34]

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Step-by-step explanation:

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3 years ago

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Joyce determines that 30% of her monthly income goes for rent. If her monthly income is $2,009, about how much is her monthly re

bixtya [17]

Answer:

602.7

7,232.4

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3 years ago

Solve the given equation. s - 19 = 12

Viktor [21]

Answer:

s=31

Step-by-step explanation:

hi again so what you are gonna do is find out the opposite of subtraction which is addition then you are gonna do the opposite..so add 19 and 12 together then your sum would be 31.....to check your answer you must subtract 31 from 19 and then you get 12....so therefore s=31

hope you are getting a better understanding!

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3 years ago

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Radium-228 has a half-life of 5.75 years. What is the decay rate for radium-228?

artcher [175]

Decay rate for Radium-228 is 0.01205

Step-by-step explanation:

The half life of radium-228 is 5.75 years. We need to find the decay rate for radium.

The formula used is:

$ln\frac{N_o}{N_t}=-\lambda t$

Where N₀ = amount of radioactive particles at time = 0

N_t = amount of radioactive particles are time (t)

λ = rate of decay constant

t = time

We are given half life so, $\frac{N_o}{N_t}$ =0.5

t= 5.75 years

We need to find λ

Putting values in formula and solving:

$ln\frac{N_o}{N_t}=-\lambda t$

$ln(0.5)=-\lambda *5.75\\-\lambda=\frac{ln(0.5)}{5.75}\\-\lambda=\frac{-0.69}{5.75}\\-\lambda=-0.1205\\\lambda=0.1205$

So, Decay rate for Radium-228 is 0.01205.

Keywords: Decay Rate

Learn more about Decay Rate at:

#learnwithBrainly

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3 years ago