Harry reads that a particular element has an atom with a mass of 0.12 grams. what is the weight of the atom expressed in scientific notation? a. 1.2 × 10-9 grams b. 1.2 × 10-11 grams c. 1.2 × 1011 grams d. 1.2 × 1012 grams

Option b -   grams.    

Step-by-step explanation:

Given : Harry reads that a particular element has an atom with a mass of 0.000000000012 grams.

To find : What is the weight of the atom expressed in scientific notation?

Solution :

Scientific notation is a way of writing a number either very large or very small.

To write a number into scientific notation when a number between 1 and 10 is multiplied by a power of 10.

We have given the number 0.000000000012.

After decimal there are 12 digits.

Taking decimal before 1 having 11 digits

Therefore, The number is re-written as

So, Option b is correct.

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

idk

step-by-step explanation: