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Mathematics

2 answers:

Free_Kalibri [48]2 years ago

8 0

Answer:

12.5cm

Step-by-step explanation:

the figure appears to be a circle centered around point B, wherein segment CB is a radiai and segment DF is a diameter.

radiai(radius plural) are known to be 1/2 the length of diameters

(1/2) × 25 = 12.5

Harrizon [31]2 years ago

8 0

Answer:

12.5

Step-by-step explanation:

DF=25

CB=12.5

because line CB is half of line DF

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Cal is measuring temperature changes in four substances over different time periods as part of a school project. Which data show

djyliett [7]

Answer:

C) The third table. K= 5

$C)\frac{10}{2}=\frac{15}{3}=\frac{25}{5}=\frac{40}{8}=k= 5$

Step-by-step explanation:

1) Below there are the missing data:

A proportional relationship through a constant k. It is obtained when we divide:

$k=\frac{y}{x}$

2)In this case, when we divide the temperature (T) by the time (h).

$k=\frac{T}{h}$

3)So, examining the table below we are searching for a ratio k common to all measures (temperatures over hour).

$A) \frac{12}{3}\neq\frac{25}{5}\neq\frac{36}{6}\neq\frac{81}{9}\\B) \frac{22.5}{3}\neq\frac{30}{4}\neq\frac{52.5}{7}\neq\frac{67.5}{8}\\C)\frac{10}{2}=\frac{15}{3}=\frac{25}{5}=\frac{40}{8}=k= 5\\D)\frac{8.5}{2}\neq\frac{22.5}{5}\neq\frac{28.5}{7}\neq\frac{36}{8}$