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4 years ago

B) Which temperature is warmer, -1 over 4 °C or -0.3 °C? Explain.

Mathematics

1 answer:

larisa86 [58]4 years ago

4 0

Answer: -0.3 degrees Celsius is warmer because -1 over 4 is -0.25 degrees Celsius.

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Sara baked chocolate chip cookies and oatmeal cookies. The ratio of chocolate chip cookies to oatmeal cookies is 3:2. If she bak

EleoNora [17]

Answer: 36 chocolate chip cookies and 24 oatmeal cookies

Step-by-step explanation:

1. 3 + 2 = 5

2. 60 / 5 = 12

3. 12 * 3 = 36

4. 12 * 2 = 24

5 0

3 years ago

Read 2 more answers

Help marking brainly

Aneli [31]

Answer:

9 + 25

Step-by-step explanation:

Step 1: Define expression

a² + b²

a = 3

b = 5

Step 2: Substitute

3² + 5²

Step 3: Evaluate

9 + 25

5 0

4 years ago

Read 2 more answers

A rectangular box with a square base is to be constructed from material that costs $9 per ft2 for the bottom, $5 per ft2 for the

kramer

Answer:

$18.73ft^3$

Step-by-step explanation:

Let

Side of square base=x

Height of rectangular box=y

Area of square base=Area of top= $(side)^2=x^2$

Area of one side face= $l\times b=xy$

Cost of bottom=$9 per square ft

Cost of top=$5 square ft

Cost of sides=$4 per square ft

Total cost=$204

Volume of rectangular box= $V=lbh=x^2y$

Total cost= $9(x^2)+5x^2+4(4xy)=14x^2+16xy$

$204=14x^2+16xy$

$204-14x^2=16xy$

$y=\frac{204-14x^2}{16x}=\frac{102-7x^2}{8x}$

Substitute the values of y

$V(x)=x^2\times \frac{102-7x^2}{8x}=\frac{1}{8}(102x-7x^3)$

Differentiate w.r.t x

$V'(x)=\frac{1}{8}(102-21x^2)=0$

$V'(x)=0$

$\frac{1}{8}(102-21x^2)=0$

$102-21x^2=0$

$102=21x^2$

$x^2=\frac{102}{21}=4.85$

$x=\sqrt{4.85}=2.2$

It takes positive because side length cannot be negative.

Again differentiate w.r. t x

$V''(x)=\frac{1}{8}(-42x)$

Substitute the value

$V''(2.2)=-\frac{42}{8}(2.2)=-11.55$

Hence, the volume of box is maximum at x=2.2 ft

Substitute the value of x

$y=\frac{102-7(2.2)^2}{8(2.2)}=3.87 ft$

Greatest volume of box= $x^2y=(2.2)^2\times 3.87=18.73 ft^3$

5 0

4 years ago

Label each pair of triangles with the postulate or theorem that proves the triangles are congruent.

Blababa [14]

Answer:

1 is 2x45

2 is x348

3 is x78

4 is x89

Step-by-step explanation:

6 0

3 years ago

Given that r is the midpoint of qs and that the lenght of qr is 5.7, find the lenght of qs

ra1l [238]

We know that the midpoint is the a point in the center of the line (r). This means that from the midpoint to the endpoint (qr) is half the length of the overall line. This means that 5.7 (the length of qr) units is half the length of the line. Two halves make a whole so 5.7 × 2 = 11.4 units as the length of the entire line qs.
Hope this helps!

5 0

3 years ago