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2 years ago

True or False the following is a function.

Mathematics

1 answer:

MissTica2 years ago

7 0

Answer:

true it is may i have brainly?:)

Step-by-step explanation:

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Which expression is equivalent to -8? A=-2^-3 B=(-1/2)^-3 C=(1/2)^-3 D=2^-3

sladkih [1.3K]

Answer:

The answer is option B.

Step-by-step explanation:

$( - \frac{1}{2} ) ^{ - 3} = ( - 2) ^{3} = - 8$

Hope this helps you

4 0

3 years ago

Read 2 more answers

The radius of a spherical balloon is measured as 20 inches, with a possible error of 0.03 inch. Use differentials to approximate

soldi70 [24.7K]

Answer:

a) $V = 33510.322\,in^{3}$ , b) $A_{s} = 5026.548\,in^{2}$ , c) $\% V = 0.450\,\%$ , $\%A_{s} = 0.300\,\%$ .

Step-by-step explanation:

The volume and the surface area of the sphere are, respectively:

$V = \frac{4}{3}\pi \cdot r^{3}$

$A_{s} = 4\pi \cdot r^{2}$

a) The volume of the sphere is:

$V = \frac{4}{3}\pi \cdot (20\,in)^{3}$

$V = 33510.322\,in^{3}$

b) The surface area of the sphere is:

$A_{s} = 4\pi \cdot (20\,in)^{2}$

$A_{s} = 5026.548\,in^{2}$

c) The total differentials for volume and surface area of the sphere are, respectively:

$\Delta V = 4\pi\cdot r^{2}\,\Delta r$

$\Delta V = 4\pi \cdot (20\,in)^{2}\cdot (0.03\,in)$

$\Delta V = 150.796\,in^{3}$

$\Delta A_{s} = 8\pi\cdot r \,\Delta r$

$\Delta A_{s} = 8\pi \cdot (20\,in)\cdot (0.03\,in)$

$\Delta A_{s} = 15.080\,in^{2}$

Relative errors are presented hereafter:

$\%V = \frac{\Delta V}{V}\times 100\%$

$\%V = \frac{150.796 \,in^{3}}{33510.322\,in^{3}}\times 100\,\%$

$\% V = 0.450\,\%$

$\% A_{s} = \frac{\Delta A_{s}}{A_{s}}\times 100\,\%$

$\% A_{s} = \frac{15.080\,in^{2}}{5026.548\,in^{2}}\times 100\,\%$

$\%A_{s} = 0.300\,\%$

4 0

3 years ago

Need help with these two questions linear relations.

wel

Answer:

b. y = -7x + 4

1. y = -7(-5)+ 4 = 35+4= 39

2. -24= -7x + 4

-28 = -7x

4 = x

3. y = -7(0)+4= 4

4. 0 = -7x+4

-4= -7x

4/7 = x

c. 3y - 5x = 15

1. 3y - 5(6)

3y-30=15

3y=45

y = 15

2. 3(-10)-5x=15

-30-5x=15

-5x = 45

x = -9

3. 3y-5(0)=15

3y=15

y=5

4. 3(0)-5x=15

0-5x=15

-5x=15

x=-3

Step-by-step explanation:

3 0

3 years ago

HELP ILL GIVE YOU BRAINLIST

timofeeve [1]

Answer:

Store B is offering the better deal on ground beef

Step-by-step explanation:

Dean is comparing prices on ground beef

Store A is selling 5 pounds of ground beef for $23.49

Store B is selling 8 pounds of ground beef for $36.96

We need to know which store is offering the better deal on ground beef

To find the better deal we must to find the unit price of each store

The unit price = total price ÷ number of pounds

∵ Store A is selling 5 pounds of ground beef for $23.49

∴ The unit price of Store A = 23.49 ÷ 5 = $4.698

∴ The unit price of Store A is $4.698 per pound

∵ Store B is selling 8 pounds of ground beef for $36.96

∴ The unit price of Store B = 36.96 ÷ 8 = $4.620

∴ The unit price of Store B is $4.620 per pound

∵ $4.620 < $4.698

∴ The unit price of Store B is less than the unit price of Store B

∴ Store B is cheaper than Store A, then it is offering the better deal

Store B is offering the better deal on ground beef

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

The price to mail a letter at the post office is $0.49 for the first ounce

trapecia [35]

The letter weighted 7 ounces

5 0

2 years ago