If you could answer both questions, that would be

4)

as shown in image

the height of tree can be calculated using pythagauras theorem

so

6^2 + x^2 = 10^2

36+x^2 = 100

x^2 = 100-36 = 64

x=√64

x= 8

so height of tree upto ladder reach is 8 feet so option 3 is answer

5) using same rule above

9^2 + x^2 = 15^2

81 + x^2 = 225

x^2 = 225 - 81 = 144

x = √144

x = 12

so height of tree upto ladder reach is 12 feet, so option 3 is answer

e.

step-by-step explanation:

because there are always 10 numbers in a phone number.