The diameter of a human hair is 9 \cdot 10^{-5}9? 10 ? 5 9, dot, 10, start superscript, minus, 5, end superscript meters. the diameter of a spider's silk is 3 \cdot 10^{-6}3? 10 ? 6 3, dot, 10, start superscript, minus, 6, end superscript meters. how much greater is the diameter of a human hair than the diameter of a spider's silk? write your answer in scientific notation.

 8.7 \times 10^{-5}

Step-by-step explanation:

Given that the diameter of a human hair

Given that the diameter of a spider's silk

Now we have to find how much greater is the diameter of a human hair than the diameter of a spider's silk. To find that we just need to subtract the given numbers. Since powers are not same so let's make them equal now we can easily subtract the coefficients that is 3 from 9  = (90-3) \times 10^{-6}

= 87 \times 10^{-6}

= 8.7 \times 10^{-5}

7.25

step-by-step explanation:

we know that 7 equals to 7.0. we also know that 1/4=0.25. so we can add the two together and we get 7.25

the answer would be d

straight away you can eliminate a and c because not all books contain a scientific skill because some may be fiction. c is also wrong because it saids that the only way children can learn is through books which is incorrect.

b is also wrong because reading can be a scientific skill but not always, therefore it is wrong which leaves you with d, the correct answer since it said that it can children learn.

hope this ! : 3