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2 years ago

WILL GIVE BRAINLIEST

Mathematics

2 answers:

nadya68 [22]2 years ago

8 0

Answer: $2^{10}$

They give you the answer in the question. Multiply $2^{3}$ and $2^{7}$ .

When multiplying exponents we add them.

Pani-rosa [81]2 years ago

7 0

Answer:

2¹⁰

Step-by-step explanation:

when the bAse the same

then,

we take them common and add their exponents.

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A person on a moving sidewalk travels 20 feet in 5 seconds. the moving sidewalk has a length of 80 feet. how long will it take t

Setler [38]

It will take 20 seconds to move from one end to another because if 20 feet is moved within 5 seconds, do that 4 more times to get to 80. Finally, multiply 5 by 4 to get 20 seconds.

7 0

2 years ago

5×12÷[-12÷{15+(4-13)}]

Elina [12.6K]

Answer:

=5×12÷[-12÷{15+(-9)}]

=5×12÷[-12÷6]

=5×12÷(-2)

=-30

Step-by-step explanation:

8 0

2 years ago

Is the following a function? (2,5),(-9,5), (1,8), (3,2), (-2,1)? A.yes B.no

ohaa [14]

Answer:

Yes

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

99 litres of gasoline oil is poured into a cylindrical drum of 60cm in diameter. How deep is the oil in the drum?

ICE Princess25 [194]

Answer:

35 cm

Step-by-step explanation:

The volume of a cylinder is given by ...

V = πr²h

We want to find h for the given volume and diameter. First, we must convert the given values to compatible units.

1 L = 1000 cm³, so 99 L = 99,000 cm³

60 cm diameter = 2 × 30 cm radius

So, we have ...

99,000 cm³ = π(30 cm)²h

99,000/(900π) cm = h ≈ 35.01 cm

The oil is 35 cm deep in the drum.

8 0

2 years ago

If Karri takes a 7 question true false test and guess on every question, what is the

dusya [7]

Answer:

The probability that she gets all 7 questions correct is 0.0078.

Step-by-step explanation:

We are given that Karri takes a 7 question true-false test and guess on every question.

The above situation can be represented through binomial distribution;

$P(X = r) = \binom{n}{r} \times p^{r} \times (1-p)^{n-r} ; x = 0,1,2,3,........$

where, n = number of samples (trials) taken = 7 question

r = number of success = all 7 questions correct

p = probability of success which in our question is probability that

question is correct, i.e. p = 50%

Let X = Number of question that are correct

So, X ~ Binom(n = 7, p = 0.50)

Now, the probability that she gets all 7 questions correct is given by = P(X = 7)

P(X = 7) = $\binom{7}{7} \times 0.50^{7} \times (1-0.50)^{7-7}$

= $1 \times 0.50^{7} \times 0.50^{0}$

= 0.0078

6 0

2 years ago