The easiest place to start for this is to calculate how much it costs per minute of call time. To do this, if we know that it costs 52.5 cents to call for 3.5 minutes, we can divide those two numbers to get how much it costs per minute.

52.5/3.5 = 15

If it costs 15 cents per minute, and we want to know how much it would cost to call for 5.33 (5 and 1/3 of a minute), then we multiply our 15 cents a minute by the number of minutes to get the final cost.

15 x 5.33 = 79.99

Because we can't have 99/100 cents, rounding up to 80 is important to get a proper answer.

6 0

3 years ago

..................................

yanalaym [24]

Answer:

The answer is a² .

Step-by-step explanation:

You have to substitute x and y into the expression :

$let \: x = a \cos(θ) \\ let \: y = a \sin( θ)$

${x}^{2} + {y}^{2} = {(a \cosθ )}^{2} + {(a \sinθ) }^{2}$

${x}^{2} + {y}^{2} = {a}^{2}( {cos}^{2}θ) + {a}^{2} ({sin}^{2}θ)$

Next, you have to apply Basic Trigonometric Identity :

${sin}^{2} θ + {cos}^{2} θ = 1$

${x}^{2} + {y}^{2} = {a}^{2} ( {cos}^{2} θ + {sin}^{2} θ)$

${x}^{2} + {y}^{2} = {a}^{2} (1)$

${x}^{2} + {y}^{2} = { a}^{2}$

8 0

2 years ago

The function c(s) gives the number of corn ears a farmer can harvest by planting s number of seeds. Each statement below can be

aleksandr82 [10.1K]

1. c(800)=600 has same meaning as after planting 800 seeds, there will be 600 corn ears.

2. c(200) = e has the same meaning as there will be e corn ears when 200 seeds are planted.

3. c(s) = 900 has same meaning as the number of corn ears is 900 when s seeds are planted.

Step-by-step explanation:

According to given statement;

c(s) = Number of corn ears

s = Number of seeds

1. After planting 800 seeds, there will be 600 corn ears.

Here,

Number of seeds = s = 800

Number of corn ears = 600

Putting in function

c(800) = 600

c(800)=600 has same meaning as after planting 800 seeds, there will be 600 corn ears.

2. There will be e corn ears, when 200 seeds are planted.

Number of seeds = s = 200

Number of corn ears = e

Putting in function

c(200) = e

c(200) = e has the same meaning as there will be e corn ears when 200 seeds are planted.

3. The number of corn ears is 900 when s seeds are planted.

Number of seeds = s

Number of corn ears = 900

Putting in function

c(s) = 900

c(s) = 900 has same meaning as the number of corn ears is 900 when s seeds are planted.

Keywords: function, variable

Learn more about functions at:

#LearnwithBrainly

4 0

2 years ago