Pleas help! exam tommarow!!!! Trigonometry word problems
Hi, i really need help with this question,
on a wall, a spider is 100cm above a fly. the fly starts moving horizontally at the speed of 10cm/s. After 1s, the spider begins moving at twice the speed of the fly, in such a way as to...
Its supposed to be sequences and series
so what I was doing was finding the % of medicnin that was in his body, but I guess this approach was wrong
So I have to find the amount of medicin that is in his body
tn-1 x 0.25+500
would be the recursave fomula
Tod injured his wrist while he was skateboarding. To relive the pain his doctor prescribed him some medication. He takes 500mg of medicine every 6h. Only 25 % of the medication remains in his body by the time he is ready to take another pill.
Write and equation to model this.
so 25% is...
are you sure? the answer in the back of the book sayes it is 34 and i cheked it again.
2. ok, thanks
4. the sum of 50 consecutive even intergers is 3250. tha...
Please help I have ALOT of questions!!
1.)Starting at 888 and counting backward by 7, a student counts 888, 881 and 874, and so on. Which of the following numbers will be included?
a) 35 b) 34 c) 33 d) 32 e) 31
Ok, so I by using the calcuator the aswer is 34, but how would you calcuate...
OK, these questions are supposed to be really easy, but I keep geting the wrong answer and I don't understand why, could someone pleas look at my work and tell me what I am doing wrong?
Find the indicated sum of each arithmetic series
S15 for 4 + 11 + 18 + ...
Sn= n/2 [ 2a + ( n - 1 ) d...
1.what is the equation of the largest circle that can be incribed in a square of side length 9 units, if the diagonals of the square intersect at (-1,3).
where the radious is 9, but the ansewer in wrong
2.Todd is flying his radio-controilled airplane abouve the ground in a circular path...
Hi, I need help with these questions
Given the endpoints of a diameter, write an equation for the circle.
a) (-3,5) and (1,3)
I tryed this
m= (x1+x2)/2, (y1+y2)/2
= (-3+1)/2 , (5+3)/2
= -2/2, 8/2
( x-h)^2 + (y-k)^2=r^2
(x+1)^2 + (y-4)^2=r^2
the ansewer in the back of the book is y=5sinpi/6(t-3)+16
But waht I dont understand is how did they know that the graph is moved 3 to the right and 16 units up? I dont understand how they got these numbers from that question, if the low tide is 11m, then would'nt that be the lowest point of...
Hi, I really need help with this question
1) the water depth in a harber is 21m at hight tide, and 11m at low tide. One cycle is completed approximatly every 12h.
a) find an equation for the water depth as a function of the time, t hours, after low tide
b) Draw a graph 48h after low...
I dont understand how to do these questions, involving angles less than 90 degrees. I know the "rules" you have to follow like if a<bsina there are two triangles etc. but what i dont understand is when there is a question, with no picture, how are you supposed to know witch one is the "a" and...