The wind is blowing at 10 knots. sailboat racers look for a sailing angle to the 10-knot wind that produces maximum sailing speed. in this application, (r, thetaθ) describes the sailing speed, r, in knots, at an angle thetaθ to the 10-knot wind. use this information to interpret the polar coordinates: (6.66.6,5454°).

341

step-by-step explanation:

all you have to do is 9x31 (which equals 279) and then 20x31 (which equals 620). then you have to subtract. 620-279=341.

12cm

the answer is d

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for