Timothy makes a round chocolate cake. She wants to put a cream layer on the cake.If the cake is 6 cm in diameter, how many square cm of cream layer does she need to put on the chocolate cake?

Answers

Answer 1

Answer: This is asking for the area of the cake. I believe the formula is a=pi r^2

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Write a real-world problem that could be represented by the expression 3(23). Then explain how you could solve the problem mentally.

Answers

3(23) really means 3*23, or just 3 multiplied by 23. For example: "Jana has 23 dollars. Her friend John has $23, and his friend Jacob also has 23 dollars. How much money do they have all together?" To solve this problem mentally, you could break 3*23 into two numbers you're familiar with multiplying, like 20 and 3, and then add the numbers together. For example: 3*20 + 3*3. 3*20=60, 3*3=9, and 60+9=69. So, 3*23=69.

ALGEBRA! NEED HELP!~A glass prism on a chandelier is 75 millimeters long. A base of the prism is an equilateral triangle with side lengtsh of 9 millimeters and a height of about 7.8 millimeters. What is the approximate surface area of the prism?

Answers

To find out a glass prism's surface are you should first find the, base's are. Since the base is triangle, it's are formula is : $A\quad =\quad \frac { h.b }{ 2 }$ (which h is height and b is base length). $A\quad =\quad \frac { 7,8.9 }{ 2 } \n A=\quad \frac { 70,2 }{ 2 } \n A=\quad 35,1$ since there are two triangle's their total area will be 70.2 To find the remaining surface's are multiply the perimeter of the base with the length. $perimeter\quad =\quad 9\cdot 3=27\n 27\cdot 75=2025$ then sum the total surface : 70,2 + 2025 = 2095,2

Write 225,120,000 in scientific notation

Answers

2.2512*10^8 let me know if its wrong

Final answer:

225,120,000 can be written as 2.2512 x 10^8 in scientific notation. The decimal was moved 8 places to the left, so the exponent is 8.

Explanation:

The number 225,120,000 can be written in scientific notation by first moving the decimal point to the right of the first non-zero digit (2 in this case), and then counting how many places it has moved. It moved 8 places to the left, so the exponent for 10 is 8. Therefore, we can express 225,120,000 as 2.2512 x 108.

So, 225,120,000 in scientific notation is 2.2512 x 108.

Learn more about Scientific Notation here:

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Rewrite 4% as a decimal

Answers

The solution to the above problem is not surprising, since percents, dollars and cents are all based on the number 100. To convert a percent to a decimal, first remove the percent symbol, then move the decimal point two places to the left... SO YOUR ANSWER WILL BE .04

.04 is 4% converted to a decimal.

Find the least common denominator for these two rational expressions a / a^2 - 6a + 9

7 / a^2 - 8a + 15

Answers

factor the 2 denominators:-

a^2 - 6a + 9 = (a - 3)(a - 3)

a^2 - 8a + 15 = (a - 3)(a - 5)

((a - 3) is common to both sets of factors so the LCD is:-

(a - 3)(a - 3)(a - 5) or this can be written as (a -3)^2(a - 5)

Write an equation or inequality to represent "five times the difference of a number n and forty two is ten more than twice the product of a number x and number y."

Answers

Five times the difference of a number n and forty two is ten more than twice the product of a number x and number y

Five times: 5 ×
difference of a number n and forty two: (n - 42)
is: =
twice the product of a number x and a number y: 2(xy)
ten more than: + 10

Rewrite the expression into an equation.

5(n - 42) = 2(xy) + 10

$5(n-42)=10+2(xy)$

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