All Answers 354281 Answers

How many minutes is a million WHAT?

How many minutes is a million MINUTES ?    = 1 000 000 minutes

                                                  seconds ? 16666 2/3 minutes

Hi guest!

(1 - 2) + (3 - 4) + (5 - 6) +.......= -1 + -1 + -1 + -1.......etc . for (2007 - 1) / 2 + 1 =-1 x 1004 terms =-1004

Take the difference in squares and then sum them up as an arithmetic sequence as follows:

All you need are the first term [101^2 - 97^2]=792 and the last term [5^2 - 1^2] =24 and the number of terms = 26 and the common difference = 4

                    
Sum =[F + L] / D x N, where F=First term, L=Last term, D=Common difference, N=number of terms.

Sum =[792 + 24] / 4 x 26
        =[816 / 4] x 26
        = 204 x 26
        = 5,304

(-5,2]   is the interval

32pi/9  rad/min =  32pi / (9*60)   rad/sec = .186 rad sec    

7 revs is 14 pi radinas

14 pi rad  / .186 rad/sec = 236.25  seconds

Since the gears are connected by a chain, they have the same LINEAR velocity:

r 15pi / 2    /60       =   27 pi/10

r =   27 pi/10  * 60 * 2/(15pi)   INCHES =   21.6 INCHES = 1.8 ft

Be careful......  everything has to be in seconds     or everything has to be in minutes  to get proper answer

  I converted   15pi/2  rad/min to   rad/sec by dividing by 60

40% 0f s = 85

.4 s = 85     s = savings amount

s = 85/ .4 = ..........

Pythagorean theorem   diagonal measure is c, the hypotenuse    one leg is 32     find other leg

42^2 - 32^2 = leg^2       Leg = 27.2 inches   (height)

A  +  A+x  + A+ 2x  = 180

69 + 3x = 180

x = common difference =  37       Angle  A = 23 ^o    Angle B = 23+37 = 60^o    Angle C = 23 + 2* 37 = 97 ^o

it doesnt seem to let me type the full sentence but what is

b. All members of our painting team paint at the same rate. If $20$  members can paint a $4800$ square foot wall in $36$ minutes, then how long would it take for $9$  members to paint a $4200$ square foot wall, in minutes?

This graph should help with parts a and b:

For part c, note that the denominator can be factored as (x+4)(x-3).

If you just put x = -4 in the original denominator you get zero, but if you put the denominator in factored form, and then cancel the (x+4) term you will have removed the singularity at x = -4. 

hmmm good to know

odd i encountered the same problem

Volume of cylinder = pi r^2 h          r = 100 cm  h = 250 cm  (but it isonly 1/2 full , so we will use 125 cm for h)

         pi (100)^2 (125) = 3926990.8 cm^3

1 l = 1000 cm ^3   so divide by 1000 to get liters  = 3926.99 ~~ 3927 l

See https://web2.0calc.com/questions/can-anyone-imagine-what-happened#r3 

This has been asked before

First voltage is not passed THROUGH a wire....voltage is applied ACROSS a wire   ...current goes THROUGH a wire.

V = IR      50 = .2 R    R = 250 ohms

Cut the wire in half  and resistance is cut in half   125 ohms

300v = I (125)    I = 2.4 amperes

b.     4800 ft²/ 20p x 36 min   = 6.6667 ft²  / p -min

   4200 ft²  /      6.6667 ft²/p-min   / 9p   = 70 min

Arrange them in ascending order.  Then, because there is an even number of them, take the two middle ones (i.e. the sixth and seventh) and form the mean of those two to generate the median.

Go to the HELP menu.  There is a CONTACT EMAIL section.  However, I suspect Andre already knows.  He's probably in the middle of modifying the calculator in some way!

sin x    has midline at 0    this one is shifted up 5

sin x + 5

maximum usually occurs at  pi / 2    this one occurs at  2  so the curve is shifted Right by .4292     (because  2- .4292 = pi / 2)

sin (x -.4292) +5     

the maximum is usually 1       shifted up 5 in our example = 6     but this maiximum is 7 ....this would be 2 shifted up 5

   so amplitude is 2

2 sin (x-.4292) + 5

yea... i have no idea how to do it :/