18÷2-4^2+9=???? Trying to answer this problem is giving me a headache

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Answer 1

Answer:

Answer:

The answer is 2. ur welcome

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Mike has $136.00 to spend on his ticket into the amusement park he spends 25% of that money on his ticket into the park.How much does Mike have left to spend?
Yana opens a saving account with $100 initial balance. She then deposits $50 each month. Which equation will represent the problem correctly?a=100m+50a=50m+100a=50m+100ma=100+50
I dont know the answer. Can someone help me ?
20 POINTSSS HELPPP!! Christa is comparing prices for the same brand and model of a security camera. Which store offers the lowest price?Store Table showing prices and incentives at different stores - first column Store, second column Regular price, third column Incentive. First row Store A, Regular price 199 dollars and 99 cents, Incentive 10 dollar mail-in rebate. Second row Store B, Regular price 217 dollars and 95 cents, Incentive sale for 15 percent off. Third row Store C, Regular price 235 dollars and 87 cents, Incentive 25 dollars off sale and 15 dollar off coupon. Fourth row, Store D, Regular price 206 dollars and 75 cents, Incentive coupon for 5 percent off a regular-price item ( picture below )

What is the multiplicative inverse of 41/59

Answers

multiplicative inverse means flipping the fraction upside down. the answer is 59/41

Find the volume of soup can if the diameter is 6.5 in and the height is 9 in

Answers

Answer:

V =298.49625 in^3

Step-by-step explanation:

Volume of a cylinder is given by

V = pi * r^2 *h

We know the diameter so we can find the radius

r = d/2 =6.5/2 = 3.25

and we know the height =9

V = pi * (3.25)^2 *9

V = pi*95.0625

If we approximate by 3.14

V = 3.14*95.0625

V =298.49625 in^3

Answer:

$V = 95.0625\pi$ inches

Step-by-step explanation:

The soup can is a cylinder, and since the diameter is 6.5 inches then the radius is 3.25 inches. The formula for the volume of a cylinder is $V = \pi r^(2)h$ , and by plugging in the values we have, we get $V = \pi *3.25^(2) *9$ .

Solving this equation gives us $V = 95.0625\pi$ inches.

Martina is going to wallpaper her wall in her bedroom.The wall is 11 feet 4 inches wide and 8 feet 3 inches high. A roll of of wallpaper is 21 inches wide and 30 inches long. Whole strips of wallpaper are cut from the roll, then glued vertically onto the wall. How many whole strips of wallpaper can Martina cut from one roll of paper?

Answers

Convert all into inches: 1 ft= 12 inc
= 11ft = 132in. Add 4 in.
132+4 = 136 inches
8 ft = 96 in. Add 3 in.
96 + 3 = 99 inches

Area of the wall is l*w = 99* 136 = 13,464 in^2
Area of one strip = 30*21 = 630 in^2

630 in = 1 strip
13464 in = X
630*X = 13464
X= 13464/630
X= 21.37

They need whole. So, Rounding it will give it 21 strips.

Which expression could be used to find the quotient of 1575÷21?A. (1000÷21) + (500÷21) + (70÷21) + (5÷21) we know this is the answer, but how do we show the work? I hated math as a kid, and my daughters teacher said even though they weren't taught this yet, they still have to do the same work.

Answers

Answer:

The quotient of (1000÷21) + (500÷21) + (70÷21) + (5÷21) is equivalent to the quotient of 1575÷21.

Step-by-step explanation:

The given expression is 1575÷21.

It can be written as

$(1575)/(21)$

Write the numerator as the sum of the place values of each digit.

$(1575)/(21)=(1000+500+70+5)/(21)$

According to the distributive property,

$(a+b)/(c)=(a)/(c)+(b)/(c)$

Using the distributive property, we get

$(1575)/(21)=(1000)/(21)+(500)/(21)+(70)/(21)+(5)/(21)$

Therefore the quotient of (1000÷21) + (500÷21) + (70÷21) + (5÷21) is equivalent to the quotient of 1575÷21.

ok you split it up into thousands hundreds tens and units those are all the working out and bye the way sorry if you have different working I am britich so they have different methods

How to write 17.5 as a fraction hurry please

Answers

17 1/2 is the fraction form of 17.5

$17 (1)/(2)$

There are 20 million bacteria per square centimeter of coral in a coral reef. The coral reef covers 13000 km^2. How many bacteria are there in the coral reef?

Answers

Answer:

2.6 * $10^(21)$ bacteria

Step-by-step explanation:

We know that there are 20 million bacteria in 1 $cm^2$ of coral reef. Let's write the number of bacteria in scientific notation with powers of 10:

$20,000,000= 2*10^7$

Now let's write 1 $cm^2$ in square meters, knowing that one cm equal 0.01 meter ( $10^(-2)$ meters:

$1 \, cm^2 = 1* (10^(-2)\,m)^2= 10^(-4)\, m^2$

So now we can find how many bacteria there is in one $m^2$ of coral reef:

Number of bacteria in $1\,m^2 = 2 * 10^7* 10^4 = 2 * 10^(11)$ bacteria

we can now express 13000 $km^2$ in $m^2$ knowing that 1 km = 1000 m = $10^3$ m:

$13000\,km^2= 1.3 * 10^4 \,km^2=1.3 * 10^4*(10^3m)^2= 1.3*10^4*10^6\'m^2=$

Since we know the number of bacteria per every $m^2$ of coral reef, the number of bacteria in $1.3*10^(10)\,m^2$ of coral reef will be the product of these two numbers:

Total number of bacteria: $2*10^(11) * 1.3*10^(10)=2.6* 10^(21)$

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