How do I solve this ad show WORK for this? Please help...

Mathematics

2 answers:

Sauron [17]2 years ago

8 0

Answer:

20%

Step-by-step explanation:

10 pieces

Austin ate 5/10 of the pizza (5 pieces)

5 pieces = 50%

Sharon ate 0.3 of the pizza (3 pieces)

3 pieces = 30%

50+30=80

100-80=20

20% left for Owen

makkiz [27]2 years ago

5 0

Hey! For this problem, you just have to convert everything into decimals, and then percentages. To convert a decimal into a percentage, just move the decimal point two to the right and add a percent sign! For example:

The amount that Sharon ate is already converted into a decimal. 0.30 as a percentage is 30%, so she ate thirty percent of the pizza!

However, you still need to convert the amount of pizza that Austin ate from a fraction into a decimal. 5/10 is equivalent to 1/2, which is 0.50! Move the decimal point two to the right, and you get 50%.

50% plus 30% is 80%, which means that only 20% of the pizza is left for Owen!

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In 1980, the average cost of a pack of cigarettes was $0.88. In 2000, the average cost was $5.31 per pack.

yan [13]

Answer:

The average rate of change of the cost of a pack is 22 cents per year.

Another name for the average rate of change is slope.

Step-by-step explanation:

The average rate of change of the cost of a pack ( $r$ ), in monetary units per year, is equal to the change in the average cost of a pack ( $\Delta c$ ), in monetary units, divided by the change in time ( $\Delta t$ ), in years. Then, the average rate of change is:

$r = \frac{\$\,5.31-\$\,0.88}{2000-1980}$

$r = \$\,0.22\,\frac{1}{yr}$

The average rate of change of the cost of a pack is 22 cents per year.

Another name for the average rate of change is slope.

8 0

3 years ago

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

BabaBlast [244]

Answer: $2.535*10^{10}$

Step-by-step explanation:

1. By definition, scientific notation has the following form:

$a*10^{b}$

Where:

a is a number between 1 and 10 but does not include 10.

b an integer.

2. When you multiply 3.25 by 7.8 the result is 25.35 and when you multiply $10^{3}$ by $10^{6}$ , you obtain $10^{9}$ , but to write ree thsult in scientific notation, the decimal point must be after the first digit. Therefore, you must move the decimal point one place to the left. So, the exponent changes from 9 to 10: