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3 years ago

6

David has a thousand trees.

2 answers:

IrinaVladis [17]3 years ago

7 0

Answer:

13

Step-by-step explanation:

1000 / 73 = 13.69 , but it asks for full rows so you get rid of the decimal if it can't be round up to a whole number

blsea [12.9K]3 years ago

6 0

Answer:

ANSWER:

13

So he can make 13 full rows of 73 trees

and 69 in another row

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Don is paid $4.75 on each class ring sold. How much will he earn if he sells 90 class rings?

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3 years ago

A manufacturer wants to make open tin boxes from pieces of tin with dimensions 8 in. by 15 in. by cutting equal squares from the

Stells [14]

Answer:

$\frac{5}{3}$ in

Step-by-step explanation:

Let x be the side of square.

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Width of box=15-2x

Height of box=x

Volume of box= $L\times B\times H$

Substitute the values then we get

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$V(x)=4x^3-46x^2+120x$

Differentiate w.r.t x

$V'(x)=12x^2-92x+120$

$V'(x)=0$

$12x^2-92x+120=0$

$3x^2-23x+30=0$

$3x^2-18x-5x+30=0$

$3x(x-6)-5(x-6)=0$

$(x-6)(3x-5)=0$

$x-6=0\implies x=6$

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Again differentiate w.r.t x

$V''(x)=24x-92$

Substitute x=6

$V''(6)=24(6)-92=52>0$

Substitute x=5/3

$V''(5/3)=24(5/3)-92=-52$

Hence, the volume is maximum at x= $\frac{5}{3}$

Therefore, the side of the square , $x=\frac{5}{3}$ in cutout that gives the box the largest possible volume.

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3 years ago

Two cards are drawn without replacement from a standard deck of 52 playing cards. What is the probability of choosing a red card

joja [24]

Answer: $\dfrac{3}{51}$

Step-by-step explanation:

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7 0

4 years ago