What is two diffrent ways to show 492

Measure of what? I'll help you in the comments if you can tell me.

Measure of what? I'll help you in the comments if you can tell me.

Isotopes can represented in two ways. In the first way, the element's symbol is used with mass number at the upper left and atomic number written on the lower left of the symbol. In the other form of representation, the isotope name is written with a dash and mass number.

Given that the isotope has 92 protons. So the atomic number is 92.

The isotope has 143 neutrons

So the mass number = Total number of protons + Neutrons

                                  = 92 + 143 = 235

Therefore, the two ways of representing the isotope is:

1.

2. Uranium-235

Isotopes can represented in two ways. In the first way, the element's symbol is used with mass number at the upper left and atomic number written on the lower left of the symbol. In the other form of representation, the isotope name is written with a dash and mass number.

Given that the isotope has 92 protons. So the atomic number is 92.

The isotope has 143 neutrons

So the mass number = Total number of protons + Neutrons

                                  = 92 + 143 = 235

Therefore, the two ways of representing the isotope is:

1.

2. Uranium-235

 440    = 1 x 2 x 2 x 2 x 5 x 11

(1):            1 x 440

(2):           2 x 220

(2 x 2):     4 x 110

(5):           5 x 88

(2x2x2):   8 x 55

(2 x 5):    10 x 44

(11):          11 x 40

(2x2x5): 20 x 22

No need to continue because the next number is 2 x 11 = 22 and we already have that on the right side, so we have found all of the multiplicative pairs of 440.

 440    = 1 x 2 x 2 x 2 x 5 x 11

(1):            1 x 440

(2):           2 x 220

(2 x 2):     4 x 110

(5):           5 x 88

(2x2x2):   8 x 55

(2 x 5):    10 x 44

(11):          11 x 40

(2x2x5): 20 x 22

No need to continue because the next number is 2 x 11 = 22 and we already have that on the right side, so we have found all of the multiplicative pairs of 440.

The answer is in the image 

Cost of 7 gallons=$24.50

Cost of 1 gallon=24.50/7=3.5

Cost of 15 gallons=15*3.5=52.5

Cost of 15 gallons will be $52.5

The answer is in the image 

The solution is in the following image