A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
Izzy's heartbeat rate was measured on an EKG machine. After conversion, the function produced could be modeled by a sine function, and the wave produced a maximum of 8, minimum of −2, and period of π. Which of the following functions could represent Izzy's EKG readout?
anonymous
 one year ago
Izzy's heartbeat rate was measured on an EKG machine. After conversion, the function produced could be modeled by a sine function, and the wave produced a maximum of 8, minimum of −2, and period of π. Which of the following functions could represent Izzy's EKG readout?

This Question is Closed

Deadly_Roses
 one year ago
Best ResponseYou've already chosen the best response.1f(x) = 5 sin 2x + 3 should be the answer when done...since all other ways cant match the readout properly....

ybarrap
 one year ago
Best ResponseYou've already chosen the best response.1dw:1444090107913:dw We need amplitude, A and period, T: $$ A\sin\frac{2\pi t}{T} $$ The amplitude goes from 8 to 2 so the max "swing" is 8  (2) = 10, the amplitude is 10/2 = 5 = A, half the "swing", and the period, T is \(\pi\). Does this make sense?

ybarrap
 one year ago
Best ResponseYou've already chosen the best response.1Now, since we have a "swing" from 8 to 2, we need to shift the whole thing below the x axis, otherwise we swing from 5 to 5 according to this equation; so, we need to add 3 to this equation: $$ A\sin\frac{2\pi t}{T} +3 $$ This is because the smallest the sine term will be is 5 and adding 3 to this brings the function up to 2 and the max from 5 to 8. Make sense?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The surface area of an oil spill gets 125% larger every day, represented by the function s(x) = (1.25)x − 1. On the first day, it covered an area of 49 square meters. Which function would be used to find the area of the oil spill on the 33rd day? A) s(x) = 49(1.25)x − 1 B) s(x) = (1.25)49 − 1 C) s(x) = (1.25)x − 49 D) s(x) = 1.25(49)x − 1

Deadly_Roses
 one year ago
Best ResponseYou've already chosen the best response.1s(x) = 49(1.25)x − 1 should be correct...
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.