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3 years ago

Ayo!! listen to me this is an easy question :)

Mathematics

2 answers:

labwork [276]3 years ago

7 0

Answer:

B ) c = 0.65n

Step-by-step explanation:

To find how much a single pound costs, divide the total cost by the total weight (2.60 ÷ 4). So, the cost (c), equals $0.65 per pound.

zimovet [89]3 years ago

7 0

2.60/4=0.65n
So, I think the answer is c=0.65n

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A scale has a percent error of 7%. The scale reads the mass of a book as 450 g.

melisa1 [442]

Answer:

The actual mass is either 453 or 447

Step-by-step explanation:

7 percent of 450

= (7/100) * 45

= 3.15

error = 3.15 g

hence actual mass

= 450 + 3.15

= 453.15

= 450 - 3.15

= 446.85

5 0

3 years ago

What is the area of the rectangle?

allsm [11]

Answer:

6300

Step-by-step explanation:

79.372539331952

6,300.00000000195

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700

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7 0

3 years ago

Pls help me i need help fast

Alona [7]

Answer:

40%

Step-by-step explanation:

30p Add up the total number of plants

12L we can see that lettuce is equal to 12

12/30 =0.4 or 40%

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3 years ago

What is the greatest number of relative maximum that a polynomial of degree 15 can have?

alisha [4.7K]

Answer:

i dont know

Step-by-step explanation:

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2 years ago

Logarithms and stuff, please help

Alla [95]

Answer:

$\displaystyle t=-25\log\left(\frac{20}{30}\right)$

Step-by-step explanation:

<u>Logarithms</u>

The model that predicts the percentage of voters (V) as a function of the number of years (t) is:

$V(t)=100-30\cdot e^{-0.04t}$

It's required to find in how many years the value of V will be V=80%. The equation to solve is:

$100-30\cdot e^{-0.04t}=80$

Subtracting 100:

$-30\cdot e^{-0.04t}=80-100=-20$

Dividing by -30:

$\displaystyle e^{-0.04t}=\frac{20}{30}$

Applying logs:

$\displaystyle \log( e^{-0.04t})=\log\left(\frac{20}{30}\right)$

For logs property:

$\displaystyle -0.04t\log(e)=\log\left(\frac{20}{30}\right)$

log(e)=1. Solving for t:

$\displaystyle t=\frac{\log\left(\frac{20}{30}\right)}{-0.04}$

Since 0.04=1/25:

$\boxed{\displaystyle t=-25\log\left(\frac{20}{30}\right)}$

6 0

3 years ago