1) Write these using index notation:
a. 2 X 2 X 2 X 2
b. 5 X 5 X 5 X 7 X 7

a)

b) x

Step-by-step explanation:

You can group together like base values, so 3 x 3 x 3 x 3 x 3 becomes 3 to the power of 5. All it means is that you are multiplying the base value (in this case 3) by itself 5 times.

Index notation makes it easier in more complex equations to solve, as its simpler and doesn't take up as much space.

Hope this helped : )

d

step-by-step explanation:

i used the pitagoras theoreme

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°