Question

6. Estimate the cube root of the following correct up to two decimal places.
(a) 260
(b) 89.5
(c) 125 x 63
(e) 3375
(1) 68921
(g) 300763

(h) 15.625
please anwer with a photo solution
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Answer 1

Answer:

Step-by-step explanation:

(e) 3375

lets make two group

3  & 375

375 ends with 5 so unit digit will be 5

now

1³ = 1  & 2³ = 8

3 lies between 1 & 8

so √3375 should be ≈ 15

68921

921 ends with 1 so unit digit will be 1

68 lies between 64  (4³) & 125 (5³)

Hence 41  is ∛68921

300763

763 end with3  so unit digit would be 7

300 lies between 216 (6³)  & 343 (7³)

hence 67 = ∛300763

15.625  = 15625 /1000

625 ends with 5 so unit digit will be 5

15 lies between 8 (2³)  & 27 (3³)

hence ∛15625 = 25

1000 cube root = 10

hence ∛15,625 = 25/10 = 2.5

Answer 2

Answer:

please explain on paper