Given that sinθ=2/5 and 0°<θ<90°, what is the exact value of cscθ. a. 5/2 b. 2/5 c. 1/2 d. 0

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)

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step-by-step explanation:

just for that im not answering

the answer is 21%.

x = -5

step-by-step explanation: