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meriva
3 years ago
6

Which is a composite number 9, 11, 31

Mathematics
2 answers:
olga55 [171]3 years ago
3 0
I mean 9 is a composite number
Lelu [443]3 years ago
3 0
A composite number:
9
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A Cepheid variable star is a star whose brightness alternately increases and decreases. For a certain star, the interval between
sattari [20]

Answer:

a)

B'(t) = \dfrac{0.9\pi}{4.4}\cos\bigg(\dfrac{2\pi t}{4.4}\bigg)

b) 0.09

Step-by-step explanation:

We are given the following in the question:

B(t) = 4.2 +0.45\sin\bigg(\dfrac{2\pi t}{4.4}\bigg)

where B(t) gives the brightness of the star at time t, where t is measured in days.

a) rate of change of the brightness after t days.

B(t) = 4.2 +0.45\sin\bigg(\dfrac{2\pi t}{4.4}\bigg)\\\\B'(t) = 0.45\cos\bigg(\dfrac{2\pi t}{4.4}\bigg)\times \dfrac{2\pi}{4.4}\\\\B'(t) = \dfrac{0.9\pi}{4.4}\cos\bigg(\dfrac{2\pi t}{4.4}\bigg)

b) rate of increase after one day.

We put t = 1

B'(t) = \dfrac{0.9\pi}{4.4}\cos\bigg(\dfrac{2\pi t}{4.4}\bigg)\\\\B'(1) = \dfrac{0.9\pi}{4.4}\bigg(\cos(\dfrac{2\pi (1)}{4.4}\bigg)\\\\B'(t) = 0.09145\\B'(t) \approx 0.09

The rate of increase after 1 day is 0.09

8 0
3 years ago
Gage had $100,000 in a CD at Lots-a-Loot Bank, which just failed. If the FDIC
SIZIF [17.4K]

Answer: $100,000 APEX!!!!!!!!!!

Step-by-step explanation:

8 0
3 years ago
A landscaper is designing a flower garden in the shape of a trapezoid. She wants the length of the shorter base to be 3 yards gr
gizmo_the_mogwai [7]
Correct Answer:
Option A. 17.1 Yards

Solution:
Let the height of trapezium is x yards. According to the given data, we can express the lengths of bases in terms of height.

The short base is 3 yards greater than the height, so measure of short base will be (x+3) yards.

The longer base is 5 yards greater than the height, so measure of longer base will be (x+5) yards.

Area of trapezium is given to be 360 square yards.

Area of trapezium = 0.5 x (Height) x (Sum of Bases)

Using the values, we get:

360=0.5(x)(x+3+x+5) \\  \\ 
720=x(2x+8) \\  \\ 
2 x^{2} +8x-720=0 \\  \\ 
2( x^{2} +4x-360)=0 \\  \\ 
 x^{2} +4x-360=0 \\  \\ 
x= \frac{-4+- \sqrt{16-4(1)(-360)} }{2} \\  \\ 
x=  \frac{-4+- \sqrt{1456} }{2} \\  \\ 
x = 17.1 , -21.1

Since the height cannot have a negative value, we conclude that the height of trapezium rounded to nearest tenth of a yard will be 17.1 yards.
7 0
3 years ago
Could any help me wit this ?
Step2247 [10]
Second, Fourth and Sixth options are right..
Please mark brainliest!
8 0
3 years ago
Make a list of 5 numbers with a mean of 12 and a mode of 15. If someone could help me out with this please, that would be very n
babymother [125]
Answer:  9 10 11 15 15 

Explanation:

\textnormal {Mean = } \cfrac{9+ 10 + 11 + 15 + 15}{5}  = 12

\textnormal {Mode = } 15


The Wise Orange is nice.
7 0
3 years ago
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