Answer:
b. 4:35 p.m
Step-by-step explanation:
Her speed in t minutes after 4:30 p.m. is modeled by the following equation:
In which v(0) is her speed at 4:30 pm and a is the acceleration.
At 4:30 p.m. she looks down at her speedometer and notices that she is going 45 mph.
This means that
Ten minutes later she looks down at the speedometer again and notices that she is going 55 mph.
This means that
So
So
When was she moving exactly 50 mph?
This is t minutes after 4:30 p.m.
t is found when v(t) = 50. So
5 minutes after 4:30 p.m. is 4:35 p.m.
So the correct answer is:
b. 4:35 p.m
Answer:
The formula for this is
The value of x would be 7.14 but since it says round to the nearest tenth it would be 7.1 or 7.10
Answer:
Julius, Nathan, Robert, Jose
Step-by-step explanation:
0.65=0.65
3/5=0.6
58%=0.58
2/3=0.66666
Questions:
<h3><u>Let's start easy.</u></h3>
<h3><u>Next up, let's make it a bit harder:</u></h3>
Ella is baking cookies to put in packages for a fundraiser. Ella has made 86 chocolate chip cookies and 42 sugar cookies.
Ella wants to create identical packages of cookies to sell, and she must use all of the cookies.
What is the greatest number of identical packages that Ella can make?
Multiply the denominators to make it one fraction.
Now for the numerator, you multiply the numerator of the the 1st fraction with the second fractions denominator. Then Multiply the 1st fractions denominator with the 2nd fractions numerator. Now with those two numbers you Subtract it. Whatever number you get is the numerator. So there is the fraction. You would just simplify it. (IF you want to add fractions instead of subtracting the numerators, you add the numerators. Like instead of 68-12 you would do 68+12
Answer:
4.45 m/s
Step-by-step explanation:
Vertical distance, Sy = 5m
The speed of pebble when they hit her window :
Vx = Sx / t
We can obtain t using the relation :
Sy = 1/2 * at²
Where, a = acceleration due to gravity = 9.8m/s²
We can obtain t
5 = 1/2 * 9.8 * t²
5 = 4.9t²
t = √5/4.9
t = 1.01 seconds
Hence,
Speed, Vx = Sx / t
Vx = 4.5 / 1.01
Vx = 4.45 m/s