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weeeeeb [17]
3 years ago
8

Lucas started off with $10.00. he gave away 20% of his money to his sister, and 30% of the remainder of his money to his brother

. How much money did Lucas have after sharing with his sister and his brother
Mathematics
2 answers:
Korolek [52]3 years ago
6 0

Answer:

5.60

Step-by-step explanation:

20% of 10 = 2             he gave 2 dollars to his sis

2 - 10 = 8                      now lucas has 8 dollars

30% of 8 = 2.4               he gave 2.40 dollars to his bro

2.4 - 8 = 5.6

now he has 5 dollars and 60 cents

<u><em>give me brainlest pls pls pls   :></em></u>

faltersainse [42]3 years ago
6 0

Answer:

5.60

Step-by-step explanation:

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Find the area of shaded region.
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6 0
2 years ago
An ice cream store has the pricing shown below. You want to determine the best value. The height of the cone is 4.5 in and the d
nignag [31]

Solution:

Step 1:

We will calculate the volume of ice cream in the single scoop

The volume of the ice cream will be

\begin{gathered} V=\frac{1}{3}\pi r^2h+\frac{2}{3}\pi r^3 \\ r=\frac{2in}{2}=1in(cone) \\ h=4.5in \\ r=\frac{3in}{2}=1.5in(radius\text{ of the hemisphere\rparen} \end{gathered}

By substituting the values, we will have

\begin{gathered} V=\frac{1}{3}\pi r^{2}h+\frac{2}{3}\pi r^{3} \\ V=\frac{1}{3}\times\frac{22}{7}\times1^2\times4.5+\frac{2}{3}\times\frac{22}{7}\times1.5^3 \\ V=\frac{33}{7}+\frac{99}{14} \\ V=\frac{165}{14} \\ V=11.79in^3 \end{gathered}

Step 2:

We will use the formula below to calculate the volume of the two scoops of ic cream

\begin{gathered} V=\frac{1}{3}\pi r^2h+\frac{4}{3}\pi r^3 \\ V=\frac{1}{3}\times\frac{22}{7}\times1^2\times4.5in+\frac{4}{3}\times\frac{22}{7}\times1.5^3 \\ V=\frac{33}{7}+\frac{99}{7} \\ V=\frac{132}{7} \\ V=18.86in^3 \end{gathered}

Step 3:

We will use the formula below to calculate the volume of the three scoops of ic cream

\begin{gathered} V=\frac{1}{3}\pi r^2h+\frac{6}{3}\pi r^3 \\ V=\frac{1}{3}\times\frac{22}{7}\times1^2\times4.5+2\times\frac{22}{7}\times1.5^3 \\ V=\frac{33}{7}+\frac{297}{14} \\ V=\frac{363}{14} \\ V=25.93in^3 \end{gathered}

For the first ice cream with one scoop

\begin{gathered} 1in^3=\frac{3.50}{11.79} \\ 1in^3=\text{ \$}0.30 \end{gathered}

For the second ice cream with two scoops

\begin{gathered} 1in^3=\frac{4.50}{18.86} \\ 1in^3=\text{ \$}0.24 \end{gathered}

For the third ice cream with three scoops

\begin{gathered} 1in^3=\frac{5.50}{25.93} \\ 1in^3=\text{ \$}0.21 \end{gathered}

Hence,

The final answer is

The triple sold at $5.50 has the best value because it has the lowest price of $0.21 per cubic inch of the ice cream

3 0
1 year ago
A department store is having a sale of 20% off of all kitchen appliances. What is the sale price for a $250 microwave?
IgorC [24]

Answer:

200

Step-by-step explanation:

The price is 100%-20%=80% of the original.

So, 250*0.8 = 200

3 0
4 years ago
How many more pounds do u need to make 5 pounds if u already have 3.85 pounds​
RUDIKE [14]

Answer:

1.15 pounds

Step-by-step explanation:

5 - 3.85 = 1.15

6 0
3 years ago
Read 2 more answers
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