When bonding teeth, orthodontists must maintain a dry field. a new bonding adhesive (called smartbond) has been developed to eliminate the necessity of a dry field. however there is concern that the new bonding adhesive is not as strong as the current standard, a composite adhesive (trends in biomaterials & artificial organs, jan. 2003). tests on a sample of 10 extracted teeth bonded with the new adhesive resulted in a mean breaking strength (after 24 hours) of x bar = 5.07 mpa and a standard deviation of s= .46 mpa. orthodontists want to know if the mean breaking strength of the new bonding adhesive is less than 5.70 mpa, the mean breaking strength of the composite adhesive.
a. set up the null and alternative hypotheses for the test. b. find the rejection region for the test using significance level=.01.c. compute the test statistic. d. give the appropriate conclusion for the test. e. what conditions are required for the test results to be valid?

80% of the cookies

step-by-step explanation:

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.

include a picture of the drawing in order for me to

step-by-step explanation:

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!