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2 years ago

Pls answer what you can and I will give brainliest.

Mathematics

1 answer:

belka [17]2 years ago

5 0

Answer:

I believe the top one is true! I'm sorry I couldn't answer them all :c

Step-by-step explanation:

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a race car is driving under the caution flag at 440 feet per second begins to accelerate at a constant rate after the warning fl

slava [35]

Answer: $\frac{1}{3}\ s$

Step-by-step explanation:

Given

Distance traveled is $s=30t^2+440t$

for s=150 ft

$\Rightarrow 30t^2+440t=150$

$\Rightarrow 30t^2+440t-150=0\\\Rightarrow 3t^2+44t-15=0\\\Rightarrow (3t-1)(t+15)=0\\\Rightarrow t=\dfrac{1}{3}\ s$

6 0

3 years ago

The navy contract was for 2,314 devices and took 23 workers two weeks (40 hours per week) to complete. The army contract was for

AlekseyPX

Answer:

0.408 hour / device

Step-by-step explanation:

As we know The army contract was for 4,707 devices that were produced by 16 workers which means 1 worker can produce: $\frac{4707}{16}$ ≈294 devices in 3 weeks.

<=> 294 devices= 3*40 hours

<=> 294 devices = 120 hours

<=> 1 device = 120/294 = 20/49 ≈ 0.408 hour

So it takes 0.408 hour for a worker to finish producing 1 devicein the army contract

3 0

3 years ago

Lyles bought a pack of 12 cookies. One-third of the cookies are peanut butter. How many of the cookies in the pack are peanut bu

DanielleElmas [232]

Hi! :)

So since you're trying to find $\frac{1}{3}$ of 12, you would just need to divide 12 by 3. The answer to this would be that 4 of the cookies were peanut butter.

Hope this helps!

8 0

3 years ago

What dose this symbol ∠ mean?

AURORKA [14]

Answer:

it either means angle or less than. pretty sure it means angle tho, cos less than is like this <

Ste. p-by-step explanation:

3 0

3 years ago

Use the following probability distribution in order to answer the probabilities that follow. x P(X = x) 1 0.05 2 0.22 3 0.35 4 0

maria [59]

Answer:

P(X = 2) = 0.22.

Step-by-step explanation:

We are given with the following probability distribution below;

X P(X)

1 0.05

2 0.22

3 0.35

4 0.30

5 0.08

Total  1

As the sum of all the probabilities is equal to 1, which means that this is a valid probability distribution.

Now, from the table above P(X = 2) = 0.22.

Hence, the probability that the X is equal to 2 is 0.22 or 22%.

7 0

3 years ago