Find the area of the triangle above. *
A11
B51
C315
D630

C. 315 units^2

Step-by-step explanation:

The formula for the area of a triangle is:

In this case, the base (b) will be 30 and the height (h) will be 21.

We can plug these numbers in the equation and make the 1/2 a .5.

A = 315

~

315 units^2

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.