Young's modulus is a quantitative measure of stiffness of an elastic material. suppose that for metal sheets of a particular type, its mean value and standard deviation are 75 gpa and 2.1 gpa, respectively. suppose the distribution is normal. (round your answers to four decimal ) calculate p(74 ? x ? 76) when n = 25.(b)how likely is it that the sample mean diameter exceeds 76 when n = 49?

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8

the answer is 5/14.

hope this .

simple 80 pieces in 1 sercing so 80*47=3760+20=3780