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Oduvanchick [21]

3 years ago

14

You have a cell phone that is 5 inches in height, 0.5 inches in width, and 2.5 inches in length, what is the surface area in sq

inches of this phone?

1 answer:

fenix001 [56]3 years ago

6 0

Answer: 32.5sq in I believe

I multiplied all the sides (ex 0.5x2.5x2) and did that with all the other sides

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Selena is standing on a rock cliff that is 52 feet high. She tosses a pebble upward over the edge, where it hits the top of a 12

Ronch [10]

Answer: At $t=\dfrac{3}{8}$ , the pebble hit the top of the boulder.

Step-by-step explanation:

Since we have given that

Distance at which Selena is standing on a rock cliff = 52 feet

Height of boulder above a rock cliff = 12 foot

So, the given quadratic equation would be

$p(t)=-16t^2+12t+52$

First we derivative it w.r.t t,

$p'(t)=-32t+12$

Now, we will find the critical value,

$-32t+12=0\\\\-32t=-12\\\\t=\dfrac{12}{32}=\dfrac{6}{16}=\dfrac{3}{8}$

Now, we will check whether it is maximum or not.

$p''(t)=-32$

So, we get that it is maximum.

Hence, at $t=\dfrac{3}{8}$ , the pebble hit the top of the boulder.

8 0

3 years ago

Read 2 more answers

Find the percent of increase or decrease<br> 55 mph to 70 mph

bearhunter [10]

Answer:

27.3% rounded

Step-by-step explanation:

5 0

3 years ago

Your family goes to a Southern-style restaurant for dinner. There are 6 people in your family.

Viktor [21]

Answer:

Number of people who order chicken dinner = 1

Number of people who order the steak dinner = 5

Step-by-step explanation:

Let

x = number of people who order chicken dinner

y = number of people who order the steak dinner

x + y = 6 (1)

14x + 17y = 99 (2)

From (1)

x = 6 - y

Substitute into (2)

14x + 17y = 99 (2)

14(6 - y) + 17y = 99

84 - 14y + 17y = 99

- 14y + 17y = 99 - 84

3y = 15

y = 15/3

y = 5

Substitute y = 5 into (1)

x + y = 6 (1)

x + 5 = 6

x = 6 - 5

x = 1

Number of people who order chicken dinner = 1

Number of people who order the steak dinner = 5

4 0

3 years ago

Sixty percent of students in Mariana's class has a pet. If 12 students have pets, how many students are in the class

Likurg_2 [28]

20 students, because 12 is 60% of 20.

6 0

3 years ago

IF P(A)=1/3, P(B)=2/5, and P(AuB)=3/5, what is P(A^B)?

Bumek [7]

The probability of the union of two events is the sum of their probability, minus the probability of their interserction:

$P(A \cup B) = P(A) + P(B) - P(A \cap B)$

If we plug the known values into this formula, we have

$\dfrac{3}{5} = \dfrac{1}{3} + \dfrac{2}{5} - P(A\cap B)$

From which we can deduce

$P(A\cap B) = \dfrac{1}{3} + \dfrac{2}{5} - \dfrac{3}{5} = \dfrac{2}{15}$

So, the probability of $A \setminus B$ is a bit less than $P(A)$ , we have to take away all events that belong to B as well:

$P(A \setminus B) = P(A) - P(A\cap B) = \dfrac{1}{3} - \dfrac{2}{15} = \dfrac{1}{5}$

3 0

3 years ago