All categories

2 years ago

What is the best estimate for the product of 289 and 7

1 answer:

7 0

I would estimate it as (300 x 7) = 2100

Then I would subtract (11 x 7) + 77 from that to get the exact answer of 2023

~~~~~~~~~~
I didn't use a calculator or paper. The 'trick' is to notice that 289 = (300 - 11)

You might be interested in

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

3 years ago

What is the ratio of melvins weight to the total weight of the two boys

Flauer [41]

Ratio of volume is a cubed: b cubed

8 0

3 years ago

Whats the difference of 2 times d minus 3

Dmitriy789 [7]

Answer:

2(d - 3) is the equation. You cannot solve for d. You can only simplify it

7 0

2 years ago

5x + y = -5 I need to graph this pls help

Lisa [10]

Hope this helps
Pls mark me brainliest

4 0

3 years ago

What is 12x12x14 equal to?

solmaris [256]

Answer:

The answer is 2016.

Step-by-step explanation:

12 times 12 = 144.

144 times 14 = 2016.

I hope this helps you. Have a nice day.

7 0

2 years ago

Read 2 more answers