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Reika [66]
3 years ago
5

Malika charges $7.20 per hour for babysitting.she babysits 4 hours each week.she spends $10 per week and puts the rest of her ea

rnings in a saving account.after 12 weeks,Malika's grandparents put a gift of money in her savings account that is equal to 0.25 times the amount she has saved from babysitting earning.How much money does Malika have in her savings account after the gift from her grandparents? Show your work
Mathematics
1 answer:
DochEvi [55]3 years ago
4 0
78. Malika earns 7.20 dollars per hour for babysitting. She Baby Sit for 4 hours each week. Now, she had a total of 12 weeks of working => 7.20 * 4 hours = 28.8 dollars => 28.8 dollars * 12 = 345.6 dollars. She spent 10 dollars per week => 10 * 12 = 120 dollars => 345.6 – 120 = 225.6 dollars is the money that goes to her savings. Her grandparents put 0.25 times of her money she put on her savings. => 225.6 * .25 = 56.4 dollars => 225.6 + 56.4 = 282 dollars.
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Madaraka express arrived in Mombasa at 0545hrson Thursday after travelling for
Liono4ka [1.6K]

Answer:

Step-by-step explanation:

For this question, you count backwards from 0545hrs which is 5:45 am until 7hrs is reached.

5:45 am Thursday

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4:45 am Thursday

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2:45 am Thursday

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1:45 am Thursday

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4 0
3 years ago
HELP ME PLEASE
solmaris [256]

Answer:

The initial mass of the sample was 16 mg.

The mass after 5 weeks will be about 0.0372 mg.

Step-by-step explanation:

We can write an exponential function to model the situation.

Let the initial amount be A. The standard exponential function is given by:

P(t)=A(r)^t

Where r is the rate of growth/decay.

Since the half-life of Palladium-100 is four days, r = 1/2. We will also substitute t/4 for t to to represent one cycle every four days. Therefore:

\displaystyle P(t)=A\Big(\frac{1}{2}\Big)^{t/4}

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\displaystyle 2=A\Big(\frac{1}{2}\Big)^3

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\displaystyle 2=A\Big(\frac{1}{8}\Big)

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A=16\text{ mg}

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\displaystyle P(35)=16\Big(\frac{1}{2}\Big)^{35/4}\approx0.0372\text{ mg}

About 0.0372 mg will be left of the original 16 mg sample after 5 weeks.

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