ElectricPavlov

45 km / 75 km/h   =             hours

Sustitute 'x-4'    in for 'x' in the equation    x^2+2x     and solve

WHAT are the numbers represented by    1-.32        is that a temp measurement?   Is it in Kelvin?

Water can get out from the top......evaporation!  The ends closed also prevent contamination of the tank contents.    Tanks are often closed on both ends.....like a tanker truck...or the LP gas tank at your house (perhaps)....

.644*.375+4 = 4.2415

.644 is from POSITIVE z-score table value 74%  (100%-26%)    .644 standard deviations (.375)  above the mean of 4 ft

Sheet metal n the tank:

TWO ends have area of pi r^2     2  x pi 4^2

PLUS the circumference x height =  pi x d x 30 = pi x 8 x 30      Add reds together to get surface area of sheet metal.

Volume of cylinder = pi r^2 h   = pi  4^2 x 30 = ......

Utah question does not have map diagram.....

Sn=n(a1 + an)/2

First one:  n=26   a₁=7   an= 7+25(4)      Can you do it now?

Second one    n=32    a1=5    a32= 1+4*32

third one    a1 = 1    an=200   n= 200

I think that shows their activity.....as a bar graph

Not sure I agree with this Chris......as I stated...it IS true that it is positive for this interval too  (2,2,5)

Yeppers!