Tetration

The square root of a number y is the number X that multiplied by itself gives the number y:

X * X = y         =>        X is the square root of y

To find the square root of pi, please use a calculator. The square root symbol looks like this: √

Click on the "Insert" button, then choose "Special character". 

If you haven't already I'd highly recommend making a drawing. 

i = initial

f = final

m(small cart) = 100 g = 0.1 Kg

v_i(small cart) = 1.20 m/s

v_f(small cart) = - 0.850 m/s

m(large cart) = 1.00 Kg 

v_i(large cart) = 0 m/s

v_f(large cart) = ?

p_i(small cart) = mv = 0.120 Kgm/s

p_i(large cart) = mv = 0 Kgm/s

p_i(large cart + small cart) = 0.12 Kgm/s = p_f(large cart + small cart)

p_f(small cart) = mv = - 0.0850 Kgm/s 

p_f(large cart) = p_f(large cart + small cart) - p_f(small cart) = 0.12 Kgm/s - (- 0.0850 Kgm/s) = 0.205 Kgm/s

v_f(large cart) = p_f(large cart)/m(large cart) = 0.205 m/s

In the form of an equation, the question translates to this:

2920 = 30% * X

Remember that "percent" means "per hundred", i.e 30% = 30/100 = 0.3

2920 = 0.3 * X       Divide both sides by 0.3:

2920/0.3 = X

X = 9766.66(6) ≈ 10 000 

Perimeter is 2(a + b) where a and b are lengths of adjacent sides. 

7:00 - 4:45 = 2:15

assuming you're referring to time. 

Here's how I'd do it:

When the question is in this form:     X:00  -  Y:Z

1. Subtract Y + 1 from X, i.e:    X - (Y + 1)      This will be your hours

2. Then add 60 - Z       This will be you minutes

A = pi * r²

pi ≈ 3.14

r is the radius

Do you want:

Area ?

Perimeter ?

Sum of internal angles ?

...

Area of ...

... triangle: bh/2      (base * height/2)

... rectangle: lw       (length * width)

... parallelogram: bh

... any quadrilateral: (pq sin t)/2 (p and q are the length of the diogonals, t is the angle between them)

The answer is 275.

Plz use any calc or google "2.75*100" the next time :/

What is 6cm, 7cm and 2cm?

Plz give us enough info and ask again.