Exercises 4.7 answers to odd-numbered problems begin on page a-9. in problems 1-24 solve each differential equation by variation of parameten state an interval on which the general solution is defined. 1. y" +y sec x 3. y" +y sin 5. y" +y cosx 7. y" - y cosh x 2. y" y tan x 4. y" +y secx tan x 6, y" + y = sec2x 8. y" -y sinh 2r 11. y" +3y' + 2y 1/e 12. y"-3y' 2y e+e) 13. y" 3y'+2y sin e 15. y"-2y' + y = ey(1 + x2) 16. y"-2y' + 2y = exsecx 17. y" + 2y, + y = e-rin x 14. y" -2y' +y-e' arctan x 18. y" + 10y' + 25y = e-i%2

the answer would be 484

step-by-step explanation:

just multiply 0.484 times 1,000 (formula)

.19875994384

step-by-step explanation:

1699/ 8548

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.

graph them on a graphing calculator, press 2nd trace. select intersect. hit enter until it says answer. ti 84 works best

step-by-step explanation: