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3 years ago

I NEED THE ANSWER I HAVE 15 MINUTES LEFT!!

Mathematics

1 answer:

sweet-ann [11.9K]3 years ago

4 0

Answer:

4 in 33

Step-by-step explanation:

all you do is add the amount of people and the propability number first

4 in 33

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36 first-graders and 14 other students attended a school assembly. What percentage of the students at the assembly were first-gr

dimaraw [331]

Answer: 18%

Step-by-step explanation: Add 36 + 14 = 50

Then 36*50/100=18

5 0

3 years ago

The base and sides of a container is made of wood panels. The container does not have a lid. The base and sides are rectangular.

vfiekz [6]

Answer:

Minimum surface area = $70.77 cm^2$

Step-by-step explanation:

We are given that

Width of container=x cm

Length of container=2x cm

Volume of container= $54 cm^3$

We have to find the minimum surface areas that this container will have.

Volume of container= $l\times b\times h$

$x\times 2x\times h=54$

$2x^2h=54$

$h=\frac{54}{2x^2}=\frac{27}{x^2}$

Surface area of container= $2(b+l)h+lb$

Because the container does not have lid

Surface area of container= $S=2(2x+x)\times \frac{27}{x^2}+2x\times x$

$S=\frac{162}{x}+2x^2$

Differentiate w.r.t x

$\frac{dS}{dx}=-\frac{162}{x^2}+4x$

$\frac{dx^n}{dx}=nx^{n-1}$

Substitute $\frac{dS}{dx}=0$

$-\frac{162}{x^2}+4x=0$

$4x=\frac{162}{x^2}$

$x^3=\frac{162}{4}=40.5$

$x^3=40.5$

$x=(40.5)^{\frac{1}{3}}$

$x=3.4$

Again differentiate w.r.t x

$\frac{d^2S}{dx^2}=\frac{324}{x^3}+4$

Substitute x=3.4

$\frac{d^2S}{dx^2}=\frac{324}{(3.4)^3}+4=12.24>0$

Hence, function is minimum at x=3.4

Substitute x=3.4

Then, we get

Minimum surface area = $\frac{162}{(3.4)}+2(3.4)^2=70.77 cm^2$

8 0

4 years ago

90-30 divided 6+2 x 5 is equal to: a)95 b) 94 c)75 d)91

DedPeter [7]

ANSWER

=95

EXPLANATION

90-30÷6+2×5

=90-5+2×5

=85+10

=95

6 0

2 years ago

lewis rolls a number cube and then chooses a card from a set of cards numbered 1 through 5. What is the probability that he will

iragen [17]

Answer:

$\frac{1}{5}$

Step-by-step explanation:

Sample Space for the Cube, A={1,2,3,4,5,6}

n(A)=6

Even Numbers in A={2,4,6}

Sample Space for the Cards, B={1,2,3,4,5}

n(B)=5

Even numbers in the card,B= {2,4}

The two events are INDEPENDENT Events as the outcome of the cube does not affect the card picked, therefore:

P(A and B)=P(A) X P(B)

= $\frac{3}{6} X \frac{2}{5}$

= $\frac{1}{5}$

3 0

3 years ago

Read 2 more answers

Factor k 2 + 8k + 15. answers. (k + 1)(k + 15) (k + 8)(k + 7) (k + 3)(k + 5)

KATRIN_1 [288]

K^2 +3k +5k + 15
k (k+3) +5 (k+3)
(k+5)(k+3)

So, the correct option is the last one.

4 0

3 years ago