Please tell the answer of question no. 1(a). If possible, try to solve it in a paper with full explanation.

Hoping for the best answer! ^_^

Note : This is grade 5 mathematics.

10% of 0 is 0

because when we working with Percentage it is actually working with decimals and multiplication.

and we know anything that is multiplied to 0 is actually 0.

so 10% can also equal 0.1

and 0.1 x 0 = 0 and

that is also 10% of 0 in an equated form.

hope this helps.

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°