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Alina [70]
3 years ago
15

Pls help am failing Hehehehgshdhdjsjbsvdv

Mathematics
1 answer:
ludmilkaskok [199]3 years ago
7 0

Answer:

should be B

Step-by-step explanation:

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Please simplify (y^-5)^4
pav-90 [236]

Answer:1/y^20

Step-by-step explanation:

8 0
3 years ago
The temperature of a cup of coffee varies according to Newton's Law of Cooling: dT dt equals negative k times the quantity T min
Maslowich

Answer:

67.3°C

Step-by-step explanation:

A = 25, T(0) = 100, T(1) = 90, find T(4)

dT/dt = -k(T - A)

d(T - A)/dt = -k(T - A)

d(T - A)/(T - A) = -k dt

ln(T - A) = lnC - kt

T(t) -A=Ce^{-kt}\\T(t) = A + Ce^{-kt} = 25 + Ce^{-kt}\\T(0) = 25 + C = 100\\C=75

T(t) = 25 + 75e^{-kt}\\T(1) = 25 + 75e^{-k} = 90\\75e^{-k} = 65\\e^{-k} = \frac{65}{75}, k = ln\frac{75}{65} = 0.1431\\T(t) = 25+75e^{-0.1431t}\\T(4) = 25+75e^{-0.1431\times4} = 67.3

4 0
3 years ago
What is the value of (-2)4?<br> What is the value of (-2) squared4
Vlada [557]
The value of (-2)4 = -8
The value of (-2)^2 (4)= 16
4 0
3 years ago
Represent root 3 on the number line​
Vedmedyk [2.9K]

Answer:

first represent root 2

6 0
3 years ago
Which congruence theorems can be used to prove ΔABR ≅ ΔACR? Select three options.
sergejj [24]

Answer:

1. HL

2. SAS

3. SSS

Step-by-step explanation:

Triangles ABR and ACR share side AR (hypotenuse of two right triiangles).

Angles ABR and ACR are right angles.

Sides AB and AC are congruent.

Sides BR and CR are congruent.

1. You can use HL theorem, because two triangles have congruent pair of legs and congruent hypotenuses.

2. You can use SAS theorem, because two triangles have two pairs of congruent legs and a pair of included right angles between these legs.

3. You can use SSS theorem, because two triangles have two pairs of congruent legs and  congruent hypotenuses.

4 0
3 years ago
Read 2 more answers
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