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3 years ago

What is the sign of a•(-b/b) when a = 0 and b <0

Mathematics

1 answer:

Art [367]3 years ago

8 0

Answer:

zero

Step-by-step explanation:

Here, we want to get the sign of the expression

since a is zero, it multiplies any value in the brackets to be zero too

zero is neither positive nor negative

What this mean is that we can only explicitly classify the sign as zero

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Target sells 24 bottles of water for $3, and 36 bottles of water for $4. Which is the better buy and by how much?

quester [9]

24 bottles @ $3 = 8 bottles per dollar
12.5 cents per bottle

36 bottles @ $4 = 9 bottles per dollar
11.1 cents per bottle

6 0

4 years ago

Equivalent expressions for 64x – 16.

gregori [183]

Answer:

Possible answers:

8 (8x - 2)

(64) x X - 16

4 (16 x- 4)

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3 years ago

Buddyhas decorated with Christmas lights to help welcome Santa!65%of the toy store is covered in lights!write this as a fraction

melomori [17]

65% of the toy store is covered in lights. To convert a percentage to a decimal, simply divide it by 100 - 65/100=0.65. To convert a decimal to a fraction, you simply write it as (number*10^(number of digits after the decimal point))/10^(number of digits after the decimal point) Since there are 2 digits after the decimal place, we have
0.65*10²/10²=65/100. Noticing that both 65 and 100 are multiples of 5, we can divide both of them by 5 to get 13/20

Another way to do this is to go from a percentage to a fraction. For this, you simply take the numbers and divide it by 100. For 65%, we have 65/100=13/20

Feel free to ask further questions!

5 0

3 years ago

A hemispherical dome of a building needs to be painted. If the circumference of the base of the

soldier1979 [14.2K]

Answer:

The cost of painting the hemispherical dome is 110880 unit

Step-by-step explanation:

Given as for a hemispherical dome :

The circumference of base = 17.6 m

The cost of painting it = 5 unit per 100 cm²

∵ circumference of base = circumference of circle = 2× $\pi$ ×radius

So ,17.6 m = 2× $\pi$ ×radius

Or, Radius = $\frac{17.6\times 7}{2\times 22}$

Or, Radius = $\frac{123.2}{44}$ = 2.8 m

Or, R = 280 cm

So, Total surface area of hemispherical dome = 3× $\pi$ ×radius²

or, Total surface area of hemispherical dome = 3× $\pi$ ×280²

Or, Total surface area of hemispherical dome = $\frac{3\times 22\times 280\times 280}{7}$

Or, Total surface area of hemispherical dome = $\frac{5174400}{7}$

∴ Total surface area of hemispherical dome = 739200 cm²

Now, The cost of painting 100 cm² is 15 unit

So, The cost of painting 739200 cm² = $\frac{15\times 739200}{100}$

Or, The cost of painting 739200 cm² = 110880 unit

Hence The cost of painting the hemispherical dome is 110880 unit Answer

7 0

3 years ago

How do you simplify ratio?

Vaselesa [24]

Ratio can be simplified by dividing both sides of the ratio by Highest Common Factor The highest common factor is the largest number that goes into both numbers of your ratio. example
Simplify 15 : 9

Ratio 15 : 9 Factors of 15 1 , 3 , 5 , 15 Factors of 9. 1 , 3 , 9 Greatest Common Factor (G.C.F)3 Divide both by G.C.F 15 ÷ 3 = 5
9 ÷ 3 = 3 Ratio in simplest form 5 : 3

8 0

4 years ago