Estimate product
126.12 and 2.2

Answers

Answer 1

Answer: so estimate
round to whole numbers
126 times 2
we know that times 2 is just add them twice
126 times 2=126+126=252
aprox 252

Answer 2

Answer: I might round 126.12 UP to 130 and 2.2 DOWN to 2, then multiply 130 x 2 to get 260. This UNDER-estimates the true answer, 277.4, because rounding 126.12 up to 130 is only a slight increase percentage-wise (about 3%) whereas rounding 2.2 down to 2 is a greater decrease percentage-wise (10%).

Related Questions

There were 24 boys and 20 girls in a chess club last year. This year the number or boys increased by 25% but the number of girls decreased by 10%. Was there an increase or decrease in overall membership?
A water cooler fills 150 glasses in 30 min. how many glasses of water can the cooler fill per minute
a sphere fits snugly inside a 6-in. cube as shown. what is the volume of the region inside the cube but outside the sphere
Given quadrilateral TUVX ~ quadrilateral MNOP and VX = 5, XT = 10, and OP = 7, what is PM?
morgan plays basketball. he bounces the ball and it goes up 50 feet above ground level in 25 seconds. by what rate per second does the ball go up in the sky?

There are two college entrance exams that are often taken by students, Exam A and Exam B. The composite score on Exam A is approximately normally distributed with mean 20.5 and standard deviation 4.9. The composite score on Exam B is approximately normally distributed with mean 1022 and standard deviation 214. Suppose you scored 27 on Exam A and 1209 on Exam B. Which exam did you score better on? Justify your reasoning using the normal model.

Answers

Answer: Exam A

Step-by-step explanation:

We must analyze how far are you from the mean in both cases, where the "step" that we will use to measure is the standard deviation.

In exam A, the mean is 20.5 and the standard deviation is 4.9.

If you scored a 27; then you need to see:

20.5 + 4.9 = 25.4

20.5 + 4.9 + 4.9 = 30.3

So you are within two times the standard deviation (more than the mean).

In the B exam, the mean is 1022 and the standard deviation is 214, where you scored 1209.

1022 + 214 = 1236

So in this exam, you are by one standard deviation away from the media.

With this, you can see that you did score better in exam A.

A fertilizer covers 5/8 square foot in 1/4 hour

Answers

it takes about 15 minutes to cover 5/8²

a rectangular prism is 11 3/5 meters long and 9 meters wide and 12 1/2 meters high what is the volume in cubic meters of the prism

Answers

volume=legntht imes widht time height
volume=11 and 3/5 times 9 times 12 and 1/2
volue=11 and 6/10 times 9 times 12 and 5/10
volume=11.6 times 9 times 12.5
volume=1305 m^3

ok so all you need to is this 11 3/5*9*12 1/2=1,305
1,305 cubic meters is there anything else
i can help you with today?

Is 4/6 greater or less than 9/12

Answers

4/6 will simplify to 2/3
9/12 will simplify to 3/4
Find a common denominator
12 is a good one
8/12
9/12
9/12 is greater than 4/6

well 4/6=2/3 because 4 divided by 2 equals 2 and 6 divided by 2 equals 3
9/12=3/4 because 9 divided by 3 equals 3 and 12 divided by 3 equals 4
so 2/3< 3/4

a)postos pelo vértice b )adjacentes suplementares c ) congruentes e não opostos pelo vértice d )suplementares e não adjacentes