Find the value of the sec 19 degrees using you calculator. (this might be a really simple question but i just don't know how to plug it into my calculator)
answers: 0.946, 1.011, 0.989, 1.058

If you're using a graphing calculator, make sure you're in DEG mode (not RAD). There probably is no button for the secant function, but remember that secant is defined as the reciprocal of cosine:

So on your calculator, you'd type

1/cos(19)

and you should get about 1.0576.

the answer is 1.058

Step-by-step explanation:

The steps on how to put it in your calculator is for sec = 1/cos angle A. so in your calculator you put 1 divided by (cos) then you put the 19 in perenties, then push enter. Then you will get your answer. Hope this helps everyone who dose not know how to put it into there calculator. : )

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.