Too much cholesterol in the blood increases the risk of heart disease. The cholesterol levels of young women aged 20 to 34 years vary approximately Normally, with a mean of 185 milligrams per deciliter ( \( \mathrm{mg} / \mathrm{dl} \) ) and a standard deviation of \( 39 \mathrm{mg} / \mathrm{dl} \). Approximately what percent of young women in this age group will have cholesterol levels of less than \( 150 \mathrm{mg} / \mathrm{dl} \) ? \( 18.5 \% \) \( 90 \% \) \( 81.5 \% \)

Scomponi applicando più metodi. \( 7 x^{5}-42 x^{4}+63 x^{3} \)

12 Mark for Review A conservation scientist implemented a program to reduce a certain invasive insect population in an area. The given function estimates this insect species population \( x \) years after 2008, vhere \( x \leq 8 \). Which of the following is the best interpretation of 2.000 in this context? (A) The estimated initial insect population for this species and area in 2008 (B) The estimated insect population for this species and area 8 years after 2008 (C) The estimated percent decrease in the in sect (D) pulation for this species and area each year after 2008 (D) The estimated percent decrease in the insect population for this species and area every 8 years after 2008

\( \frac { 57 } { 100 } ; \frac { 243 } { 10.000 } ; \frac { 131 } { 1.000 } ; \frac { 17 } { 1.000 } ; \frac { 231 } { 100 } ; \frac { 74 } { 10 } \)

Indy is making a garden path which needs sand, gravel and cement mixed in the ratio of \( 5: 2: 1 \). How much sand and cement is required to mix with \( 1.2 \mathrm{~m}^{3} \) of gravel? State your answer in cubic netres, correct to one decimal place. ( 3 marks)

Find the equation of the line tangent to the graph of \( f \) at the indicated value of \( x \). \( f(x)=4+5 \ln x ; x=1 \)