1 + ( 4.5 – 3.6) * (-1)
(-)
4
+
X
3
10
4
-
3
2
11

B. 3.6 x 10^3

Step-by-step explanation:

(1.2 x 10^-2) x (3 x 10^5)

When we multiply terms with powers , we multiply the factors out front and add the exponents

a * 10^b  * c* 10^d = ac * 10^(b+d)

(1.2 x 10^-2) x (3 x 10^5)   = (1.2* 3) * 10^(-2+5)

                                        = 3.6 * 10 ^3

Step-by-step explanation:

i think its 7.6

if so your welcome