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kolezko [41]
2 years ago
8

Please help me with 7 8 9 10 and 11

Mathematics
2 answers:
Rufina [12.5K]2 years ago
7 0

Answer:

10 is b, 11 is false, 9 is false, 8 is points D, A, and B, 7 is CB and CA

Step-by-step explanation:

Alenkinab [10]2 years ago
4 0

Answer:

for number 10 it is a

Step-by-step explanation:

i don't know but i did do homework and i got number 10 right sorry.

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If you place a cup of 210 degree Fahrenheit coffee on a table in a room that is 68 degrees fareinheit, and ten minutes later, it
Lana71 [14]
Newton's Law of Cooling

Tf=Ts+(Ti-Ts)e^(-kt)   where Tf is temp at time t, Ts is temp of surroundings, Ti is temp of object/fluid.  So we need to find k first.

200=68+(210-68)e^(-10k)

132=142e^(-10k)

132/142=e^(-10k)

ln(132/142)=-10k

k=-ln(132/142)/10

k≈0.0073  so 

T(t)=68+142e^(-0.0073t)  so how long until it reaches 180°?

180=68+142e^(-0.0073t)

112=142e^(-0.0073t)

112/142=e^(-0.0073t)

ln(112/142)=-0.0073t

t= -ln(112/142)/(0.0073)

t≈32.51 minutes


8 0
3 years ago
Evaluate:<br> g(x) = 3•2^x+2 + 3<br> g(3)
sertanlavr [38]

If the 3 is supposed to be replaced by any x's, then the answer would be 29 I believe.

4 0
2 years ago
LCM OF 24,39,60 and 150 is<br>​
Salsk061 [2.6K]

Answer:

The LCM of 24,39,60, and 150 is 7,800.

Step-by-step explanation:

I use prime factorization and then I mulitply all of the double numbers.

8 0
3 years ago
How many 7-digit phone numbers are possible, assuming that the first digit can’t be a 0 or a 1? (b) re-solve (a), except now ass
sladkih [1.3K]
A. We are going to form 7 digit numbers from the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}

where the first digit cannot be 0 or 1.

so we have 8 choices for the 1. digit, and 10 choices for all the other 6 digits.

this means there are 8*10*10*10*10*10*10=8* 10^{6} possible numbers.

b.

consider the numbers which start with 911. There are 10*10*10*10=10 ^{4} such numbers, since for the 4th, 5th, 6th and 7th digits we have 10 choices.

then we remove this number, from the one we found in a:

There are in total 8* 10^{6}-10^{4}=7,990,000 numbers which don't start with 911.


Answer:

a.8*10^{6}
b.7,990,000

3 0
3 years ago
If you ate 1/5 of the desert served at<br> dinner, what percent of the food did you<br> eat?
VARVARA [1.3K]
20% of food is eater. 1 divided by 5 is 0.2. You move the decimal 2 unites which would be 20.
5 0
3 years ago
Read 2 more answers
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