math stuff

posted by .

Do the exact calculation:
7182 x 2123= ________
Approximate to the nearest hundred
_____x_____=__________
Difference between exacct and approximate value=_______

Can you help me with another problem too?

N of the 20 coins are quarters and the rest are dimes. the total value of the coins is \$3.50. Find N.

approxiamate to nearest hundred? Somebody has to be kidding, or they don't understand approximations...This is an nine digit number, and the question asks to approximate it to seven digits. That is NOT an approximation. Seven digits is rather precise.

Value=.25n + (20-n).10
3.5=.25n + 2 - .1n
1.5=.15n
n= 10

yeah that what the packet says... i should show my teacher or something. i need help with this one just setting up the equation: David is Y years old. in 15 years he will be 2 times as old as he was 10 years ago. David is____.

Similar Questions

1. algebra help

I need help with this problem not understanding it. Give exact and approximate solutions to three decimal places. x^2+6x+9= 81 what are the exact solutions?

In 2000 the population of goddard was 5,554. The population of Valley Center was 7,323. What is the Approximate difference between the populations, to the nearest one hundred people. please! help I'm totaly confuse with this question?
3. math

Find the approximate value of the volume of the right circular cone of 20 cm , 32 cm with a circular base shown below. Approximate your solution to the nearest hundredth.
4. math

An initial-value problem is given by the differential equation, f(x,y) = x + y, y(0) = 1.64 The Euler-midpoint method is used to find an approximate value to y(0.1) with a step size of h = 0.1. Then use the integrating factor method, …
5. Math

Give the exact and approximate solutions to three decimal places. X^2-7x+3=0 The exact solutions are x=________ The approximate solutions to 3decimal places are x=___________
6. math (SIMPLE INTEREST)c

calculate the exact and approximate number of days i) from 19 november 1995 to 1 may 1996 then,i want to know how i can differences between exact time approximate time. sometimes i cannot understand how to find the approximate time
7. Algebra

Solve the problem using matrices. John has a jarful of quarters and nickels. There are 84 coins in the jar. The value of the coins is \$13.00. How many of each type of coin are there?
8. Math word problem

George has 21 coins with a total value of \$12.75. He knows he only has quarters and dollar coins in his pocket. How many coins of each type does he have?
9. Geometry

I am doing volume and surface areas of 3D figures, and am running into the problem of having to give the exact answers as well as approximate answers. The approximate answers I don't have a problem with but the exact answers are requiring …
10. Math Statistics

N= 80 p = 0.7 x = 62? A) Exact: 0.0335; Approximate: 0.0334 B) Exact: 0.0343; Approximate 0.0334 C) Exact: 0.0343; Approximate: 0.0350 D) Exact: 0.0343; Approximate: 0.0342 Which one is the correct answer and can you show work please?

More Similar Questions