Alex wants to make a fleece blanket to cheer up her friend. One yard of material cost $3.90. If Alex wants to purchase 3.5 yards of fleece to make the blanket, what is the total cost?

$13.65

Step-by-step explanation:

If one yard of material costs $3.9 and Alex wants to purchase 3.5 yards in total, we can solve this problem using rule of three, as we have the cost of one yard and just want to know the cost of more yards:

1 yard of material costs $3.9, so 3.5 yards of material costs X:

1 -> 3.9

3.5 -> X

X = 3.5 * 3.9 = 13.65

So, the total cost will be $13.65

5 pm

step-by-step explanation:

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204